Synanthropic

Guides

• Acanthoscelides obtectus

  Bean Weevil, Bean Bruchid, Dry Bean Weevil

  Acanthoscelides obtectus is a small bruchid beetle and major pest of stored legume seeds, particularly common bean (Phaseolus vulgaris). Native to mountainous regions of northern South America, it has spread globally through grain shipments and now occurs on every continent except Antarctica. The species is notable for its ability to infest seeds both in the field and in storage, with larvae developing entirely within seeds while adults feed on pollen. Its economic impact stems from reduced seed quality, germination failure, and contamination of legume products.

  bruchidstored-product-pestlegume-pestinvasive-speciesseed-predatoragricultural-pestpost-harvest-pestpolyphagousparthenogenesis-not-reportedsynanthropic

• Acaridia

  Acaridia is a zoosubsection within the suborder Astigmatina (order Sarcoptiformes), encompassing a diverse group of mites commonly referred to as acarid mites. The group includes at least 136 species in 50 genera and 14 families documented in China alone, with substantial diversity also recorded in other regions. These mites are predominantly synanthropic, occurring in human-associated environments such as stored products, barns, and dwellings. Research has documented significant altitudinal variation in species diversity, with higher richness at lower elevations.

  mitesacariformesastigmatinasynanthropicstored-product-pestsaltitudinal-distribution

• Amaurobius ferox

  black lace-weaver, black lace weaver

  Amaurobius ferox is a nocturnal spider known for its distinctive cribellate web with woolly, lace-like silk. The species exhibits a unique subsocial organization among spiderlings, including synchronized molting, cooperative prey capture, and matriphagy—where offspring consume their mother after hatching. Native to Europe, it has been introduced to North America and is commonly found near human structures in dark, moist environments.

  subsocialmatriphagycribellate-webnocturnalsynanthropiccave-entrance-speciessynchronized-moltingtrophic-eggsEuropeintroduced-speciesNorth-Americamaternal-carespiderling-cooperationmedical-significanceminor-envenomation

• Amaurobius similis

  Lace-Weaver Spider, lace-webbed spider

  Amaurobius similis is a small spider in the family Amaurobiidae, commonly known as the lace-weaver spider. It is frequently found in human dwellings, particularly near windows and in wall crevices. The species is visually similar to A. fenestralis, with which it has been historically confused, and reliable identification requires microscopic examination of genitalia. It has a Holarctic distribution, native to Europe and the Caucasus, and has been introduced to North America.

  spiderhouseholdsynanthropicHolarcticcryptic-species-pair

• Anthrenus verbasci

  Varied Carpet Beetle

  Anthrenus verbasci is a cosmopolitan pest species in the family Dermestidae, commonly known as the varied carpet beetle. Adults are small (2–4 mm), rounded beetles with distinctive patterned elytra bearing bands or spots of brown, black, and white scales. Larvae are covered in dense setae and feed on dried proteinaceous material, causing damage to household items, museum collections, and stored agricultural products. The species exhibits circannual control of its life cycle, with photoperiod serving as the primary zeitgeber for synchronizing pupation and adult emergence in spring. Adults feed on pollen and nectar, particularly from umbelliferous plants (Apiaceae) and Asteraceae, and use both olfaction and vision in host plant selection.

  pestmuseum-pesthousehold-peststored-product-pestcarpet-beetledermestidpollinatorcircannual-rhythmphotoperiodismApiaceaeAsteraceaeAegopodium-podagrariacosmopolitansynanthropicprotein-feederkeratin-feederegg-predatorforensic-relevanceclassical-model-organism-for-biological-rhythms

• Araneae

  spiders

  Araneae is an order of air-breathing arachnids comprising over 51,000 described species across 136 families, ranking seventh in total species diversity among all organismal orders. Members are characterized by two body regions (cephalothorax and unsegmented abdomen), eight legs, cheliceral fangs with venom glands, and abdominal spinnerets that produce silk. The order is divided into two suborders: Mesothelae (87 species, retaining abdominal segmentation) and Opisthothelae (over 39,000 species, without abdominal segmentation). Spiders occupy virtually all terrestrial habitats worldwide except Antarctica, functioning exclusively as predators of insects and other small arthropods.

  arachnidspredatorssilkweb-buildingbiodiversitycryptic-speciesDNA-barcodingMadagascarAustraliaCanadaBrazilTasmaniasynanthropicconservationintegrative-taxonomy

• Araneus cavaticus

  Barn Spider, Barn Orbweaver

  Araneus cavaticus, commonly known as the barn spider, is a large orb-weaving spider native to North America. Females reach approximately 20 mm in body length and are typically yellow and brown in coloration. The species is strongly associated with human structures, particularly barns and wooden buildings, where they construct their webs in rafters and under eaves. The barn spider gained cultural significance as the basis for the character Charlotte in E. B. White's children's novel Charlotte's Web.

  orb-weaversynanthropicnocturnalliterary-significance

• Armadillidium nasatum

  Nosy Pill Woodlouse

  Armadillidium nasatum is a large woodlouse species native to Western Europe, particularly Britain, that has been introduced to North America and other regions. It reaches up to 21 mm in length and is distinguished from congeners by a rectangular protrusion ("nose") at the apex of the head and a rounded tail tip with incurved sides. Unlike some relatives, it does not form a complete ball when enrolled. The species exhibits synanthropic tendencies and prefers drier habitats than most woodlice.

  isopodwoodlousepill-bugintroduced-speciessynanthropicEuropeNorth-Americaterrestrial-crustacean

• Artema

  Giant Cellar Spiders

  Artema is a genus of cellar spiders (family Pholcidae) first described by Charles Athanase Walckenaer in 1837. The genus includes some of the largest pholcid spiders and is primarily distributed from West Africa through Central Asia to Pakistan. One species, A. atlanta, has been introduced worldwide. The genus comprises twelve recognized species as of October 2025.

  Pholcidaecellar-spidersgiant-cellar-spiderssynanthropiccave-dwellingintroduced-species

• Artema atlanta

  giant daddy-long-legs spider, Giant Cellar Spider

  Artema atlanta is a large cellar spider and the largest known pholcid, with a body length of 8–11 mm. It has a pantropical distribution and has been introduced to temperate regions including North America and Europe. The species is commonly known as the giant daddy-long-legs spider. It constructs tangled webs in dark, sheltered locations and exhibits characteristic pholcid behavior of rapid, vibrating movement when disturbed.

  spiderPholcidaecellar-spiderpantropicalsynanthropiclarge-bodied

• Attagenus smirnovi

  Brown Carpet Beetle, Vodka Beetle

  Attagenus smirnovi is a synanthropic dermestid beetle commonly known as the brown carpet beetle. Native to Africa, it has established populations across Central and Northern Europe through human-mediated dispersal. The species is a significant pest of museum collections and households, feeding on keratin-based materials including wool textiles, carpets, fur, and skin. First described by Rustem Devletovich Zhantiev in 1973, it was named after E.S. Smirnov, who first observed it in Moscow in 1961.

  synanthropicpestmuseum-pesttextile-peststored-product-pestinvasiveclimate-change-indicator

• Attulus fasciger

  Asiatic Wall Jumping Spider

  Attulus fasciger is a small jumping spider native to northern and western Asia, introduced to North America in the mid-20th century. It measures 3–4 mm and exhibits brownish-black coloration with mottled brown-and-grey patterning. The species has successfully established in human-modified environments, particularly on man-made structures where artificial lighting extends its foraging opportunities. Males are distinguished from females by a more slender abdomen and enlarged black palps.

  introduced-speciesurbansalticidaejumping-spidersynanthropicnocturnal-foragingAsia-nativeNorth-America-introducedartificial-light-associationbuilding-dwelling

• Attulus pubescens

  Downy jumping spider

  Attulus pubescens is a small jumping spider in the family Salticidae, formerly classified as Sitticus pubescens until 2017. Females reach approximately 5 mm in body length, with males slightly smaller at around 4 mm. The species exhibits dark coloration with variable white markings and is frequently associated with human structures, including walls, fences, and building interiors. It is native to Europe, North Africa, and parts of Asia, and has been introduced to North America.

  synanthropicurbanintroducedPalearctic-native

• Badumna

  House Spiders, Black House Spider, Grey House Spider

  Badumna is a genus of medium to large cribellate spiders in the family Desidae, first described by Tamerlan Thorell in 1890. The genus is native to the Indo-Australian region, with most species endemic to Australasia. Several species, particularly B. longinqua and B. insignis, have become synanthropic and have been introduced to multiple continents, establishing populations in urban environments. The most well-known species, B. insignis, is commonly called the 'black house spider' and has been documented in Japan as an introduced species.

  cribellatesynanthropicinvasivenocturnalsit-and-wait-predatormarronoidintertidal

• Badumna longinqua

  Grey House Spider

  Badumna longinqua, the grey house spider, is a medium-sized spider native to eastern Australia that has become a widespread invasive species. It is highly synanthropic, thriving in urban environments and artificial structures rather than natural habitats. The species constructs distinctive messy, ladder-like webs from retreats in cracks and crevices. Females may remain in the same web for their entire lives, while males disperse to seek mates during warmer months.

  synanthropicinvasivenocturnalweb-buildingcribellate

• Blaniulidae

  Thin Snake Millipedes

  Blaniulidae is a family of julid millipedes characterized by extremely elongated, slender bodies with length-to-width ratios reaching 30:1. Members possess distinctive ozadenes (odiferous defensive glands) visible as spots on each segment, and may have eyes present or absent depending on species. The family exhibits diverse habitat preferences including leaf litter, soil, caves, and synanthropic environments. Several genera contain troglobitic species restricted to subterranean habitats, while others are widespread across Europe and have been introduced to other continents.

  millipedediplopodajulidadecomposercave-dwellingsynanthropic

• Blaps mucronata

  Churchyard Beetle

  Blaps mucronata is a tenebrionid beetle known as a pest of stored products. The species exhibits nocturnal activity patterns synchronized with human or animal activity cycles, particularly in enclosed environments like stables. It has been documented in Europe, with specific biological studies conducted in Germany. The beetle possesses defensive secretions and shows distinct habitat preferences for humid, dark environments.

  stored-product-pestnocturnaldefensive-secretionsynanthropichumidity-dependentEuropean-distribution

• Blattellinae

  wood cockroaches

  Blattellinae is a subfamily of Ectobiidae containing approximately 70 genera. It includes the globally distributed German cockroach (Blattella germanica), a major household pest, as well as several endangered species such as those in Hololeptoblatta and Miriamrothschildia. The subfamily exhibits diverse ecological adaptations, with members occupying habitats ranging from wetlands and grasslands to caves and human dwellings.

  cave-dwellingsynanthropicwetlandendangeredpest

• Centruroides gracilis

  Slender Brown Scorpion, Florida Bark Scorpion, Brown Bark Scorpion, Red Bark Scorpion, Slender Red Scorpion, Alacran Prieto, Alacran Azul

  Centruroides gracilis is a medium to large scorpion in the family Buthidae, notable for its wide color variation and extensive introduced range. Females reach up to 10 cm, while males can exceed 15 cm. The species exhibits remarkable phenotypic plasticity, with individuals in single populations or even litters showing colors ranging from reddish to dark brown with contrasting leg and chelae coloration. It is native to northern Central America but has been introduced to numerous regions including Florida, the Caribbean, South America, Africa, and the Canary Islands, often occurring in synanthropic habitats.

  scorpionbark-scorpionvenomoussynanthropicintroduced-speciesfluorescencenocturnal

• Cheiracanthiidae

  Long-legged Sac Spiders

  Cheiracanthiidae is a family of araneomorph spiders established by Wagner in 1887, with priority over the synonym Eutichuridae. The family contains approximately 15 genera and 385 species as of 2026, with Cheiracanthium being the largest and most species-rich genus. Members are commonly known as long-legged sac spiders. The family's phylogenetic placement has been historically contested, having been assigned to Clubionidae, Miturgidae, and Eutichuridae before recognition as a distinct family. Molecular analyses indicate Cheiracanthium is paraphyletic, with divergence estimated at 67 million years ago.

  AraneaeAraneomorphaeDionychaspiderssynanthropicsac-spidersCheiracanthiumtaxonomic-revisionmitogenomics

• Cheiracanthium

  Longlegged Sac Spiders, Yellow Sac Spiders

  Cheiracanthium is a genus of araneomorph spiders in the family Cheiracanthiidae, first described by Carl Ludwig Koch in 1839. Commonly known as longlegged sac spiders or yellow sac spiders, the genus contains over 230 accepted species. These spiders are notable for their pale coloration, nocturnal hunting behavior, and habit of constructing silken retreats rather than permanent webs. They are frequently encountered in human dwellings, particularly in temperate regions, and have been the subject of controversy regarding their medical significance.

  spiderarachnidsac-spidernocturnalsynanthropicmedically-significant

• Cheiracanthium mildei

  Northern Yellow Sac Spider, Long-legged Sac Spider

  Cheiracanthium mildei is a medium-sized spider native to Europe and North Africa, introduced to North America and parts of South America. Adults measure 7–10 mm in body length with pale green or tan coloration, darker palpi and chelicerae, and characteristically long front legs up to twice the length of others. It constructs silken retreats rather than capture webs, hunting actively at night. The species is frequently encountered in human dwellings, particularly in northern regions of its introduced range, and has been documented to bite humans with generally mild effects.

  spidersynanthropichunternocturnalintroduced-speciesessential-oil-repellencymedically-insignificant

• Chelifer

  Chelifer is a genus of pseudoscorpions in the family Cheliferidae, established in 1762. The genus is currently monotypic, containing only Chelifer cancroides, the house pseudoscorpion, which is the most widely distributed pseudoscorpion species globally. All other species originally described in Chelifer have been moved to other genera, synonymized, or designated as nomina dubia or nomina nuda. The genus is characterized by distinctive morphological features including large setose tubercles on the carapace and specialized male genitalia structures.

  pseudoscorpionarachnidsynanthropiccosmopolitanmonotypic-genus

• Chelifer cancroides

  House Pseudoscorpion

  Chelifer cancroides, the house pseudoscorpion, is a small pseudoscorpion species measuring 2.5–4.5 mm in body length with pedipalps extending to 7–9 mm. It is the most widely distributed pseudoscorpion species globally, occurring across North America, Europe, Africa, Australia, and the Caribbean. The species is strongly synanthropic, frequently found in human dwellings, barns, and beehives, but also occurs in natural habitats including under tree bark, in caves, and in bird nests. It is harmless to humans and preys on small arthropods.

  cosmopolitansynanthropicharmless-to-humanspredatorvenomous-pedipalpsphoreticbiological-control-potential

• Chilopoda

  Centipedes

  Chilopoda is a class of venomous, predatory arthropods comprising the centipedes. These elongated metameric animals possess one pair of legs per body segment, with leg counts ranging from 30 to 354 depending on species. Centipedes are distinguished from millipedes (class Diplopoda) by their single pair of legs per segment, flattened body profile, and venomous forcipules derived from modified first leg pairs. The class contains four extant orders: Scutigeromorpha (house centipedes), Lithobiomorpha (stone centipedes), Geophilomorpha (soil centipedes), and Scolopendromorpha (giant centipedes). All are obligate carnivores with predatory lifestyles.

  carnivorevenomousnocturnalcave-dwellingpredatormyriapodarthropodtroglomorphicaposematicsynanthropic

• Chondromorpha xanthotricha

  Chondromorpha xanthotricha is a millipede in the family Paradoxosomatidae. Native to South India and Sri Lanka, it has become a widespread introduced species across tropical and subtropical regions through human-mediated transport. Adults measure 20–26 mm and exhibit notably rapid movement compared to many millipedes. Two subspecies are recognized: C. x. hamuligerus and C. x. hirsutus.

  synanthropicintroduced-speciestramp-speciesmillipedeflat-backed-millipede

• Choneiulus palmatus

  Palm Millipede

  A small julid millipede native to the Atlantic zone of northwest Europe, now widely distributed through synanthropic spread and human introduction. Adults reach 12–15 mm with up to 58 body rings. The species shows strong association with human-modified environments in parts of its range, particularly in northern Britain, while retaining woodland populations elsewhere. A genome assembly of 626.52 Mb has been published from an Oxfordshire specimen.

  millipedesynanthropicgenome-sequencedEuropean-nativeintroduced-species

• Chrysomya megacephala

  oriental latrine fly, oriental blue fly

  Chrysomya megacephala is a warm-weather blowfly with metallic blue-green coloration, notable for its forensic importance in estimating post-mortem intervals due to its rapid colonization of corpses. The species exhibits two distinct forms: a normal forest-dwelling form restricted to South Pacific Islands, and a synanthropic derived form that has spread globally from Papua New Guinea and is closely associated with human environments. It serves as a significant public health concern through its role in causing accidental myiasis and mechanically transmitting pathogens to human food.

  forensic-entomologyblowflymyiasiscarrioninvasive-speciessynanthropicpublic-health

• Cimicidae

  bed bugs, cimicids

  Cimicidae is a family of small, wingless, blood-feeding parasitic insects comprising over 100 species. Members are obligate hematophages of warm-blooded vertebrates, primarily bats, birds, and humans. The family is notable for traumatic insemination, a unique reproductive strategy where males pierce the female abdominal wall to deposit sperm. Cimicids harbor bacterial symbionts in specialized mycetome organs that may assist with nutrient acquisition. The common bed bug (Cimex lectularius) is the most widely known member and a significant urban pest.

  ectoparasitehematophageurban-pesttraumatic-inseminationinsecticide-resistancewinglesssynanthropic

• Cithaeron

  Cithaeron is a genus of small, nomadic spiders in the family Cithaeronidae. Members are characterized by depressed posterior median eyes and pseudosegmented tarsi. The genus includes species with Old World origins that have become established as human-mediated introductions in multiple regions, including the Americas. Cithaeron praedonius, the best-known species, was first documented in Florida in 2011 and has since been recorded in multiple counties.

  spiderinvasiveOld-Worldnomadic-huntersynanthropiccitizen-scienceFlorida-introductioneye-arrangement-diagnostic

• Cithaeronidae

  Curly-legged Ground Spiders

  Cithaeronidae is a small family of araneomorph spiders in the superfamily Gnaphosoidea, established by Simon in 1893. The family contains two genera—Cithaeron and Inthaeron—with approximately ten described species. Members are small, pale yellowish, fast-moving nocturnal hunters that construct silken retreats under rocks. Several species, notably Cithaeron praedonius, have been introduced to the Americas and Australia through human activity.

  spiderarachnidground-spidergnaphosoidnocturnalintroduced-speciessynanthropicFloridainvasive

• Clogmia

  drain flies, moth flies, filter flies, bathroom flies

  Clogmia is a genus of small, non-biting drain flies in the family Psychodidae. Adults are 3–5 mm long with fuzzy, moth-like appearance due to dense hairs on wings and body. The genus includes the cosmopolitan species C. albipunctata, commonly known as the filter fly or bathroom fly, which frequently inhabits human dwellings. These flies are primarily nuisance pests associated with moist, decaying organic matter. Larvae play a documented role in sewage treatment as decomposers.

  Psychodidaedrain-flymoth-flyfilter-flysewage-treatmentdecomposernuisance-pestcosmopolitansynanthropicnon-biting

• Coleosoma floridanum

  Coleosoma floridanum is a small cobweb spider in the family Theridiidae. The species has a broad native distribution across the Americas and has been introduced to multiple regions worldwide, including Europe, West Africa, and Pacific islands. It builds irregular, tangled webs characteristic of its family.

  spidercobweb-spiderintroduced-speciesTheridiidaeAmericassynanthropic

• Crossopriza

  cellar spiders

  Crossopriza is a genus of cellar spiders (family Pholcidae) described by Eugène Louis Simon in 1893. The genus comprises 24 species as of October 2025, with native distributions in Africa and Asia. The most widely known member, C. lyoni, has become cosmopolitan through human-mediated introduction and is now found globally in human dwellings.

  Pholcidaecellar-spidersynanthropiccosmopolitanC.-lyonilaboratory-model

• Crossopriza lyoni

  Tailed Cellar Spider, Tailed Daddy Longlegs Spider, Box Spider

  Crossopriza lyoni is a cosmopolitan cellar spider (Pholcidae) characterized by extremely long, fragile legs and a distinctive box-shaped abdomen. Females reach 3–7 mm in body length, males 2.5–6 mm, with leg spans up to 6 cm. The species is synanthropic, thriving in human dwellings worldwide, particularly in tropical to subtropical regions. It constructs extensive, irregular cobweb-like webs and is often regarded as both a household pest and beneficial predator of mosquitoes and other arthropods. Native range unknown; now pantropical through human-mediated introduction.

  Pholcidaesynanthropicinvasivebiological-controlmosquito-predatorurban-legendvibrating-spiderlaboratory-modelantibacterial-silkpantropical

• Cryptolestes turcicus

  flour mill beetle

  Cryptolestes turcicus is a small beetle commonly known as the flour mill beetle, a member of the family Laemophloeidae (lined flat bark beetles). It is a significant pest of stored grain products, particularly in flour mills and warehouses. The species has been introduced widely through human commerce and now occurs in North America and Europe. Populations can maintain themselves only within a temperature range of 17°C–37°C and at relative humidities above 40%, with optimal reproduction near 28°C and 90% relative humidity.

  stored-product-pestflour-mill-beetlegrain-pestsynanthropic

• Cryptophagus

  silken fungus beetles

  Cryptophagus is a genus of small beetles in the family Cryptophagidae, commonly known as silken fungus beetles. The genus has a nearly cosmopolitan distribution across all biogeographic realms. Members are fungivores that feed on fungal spores and hyphae, and are frequently associated with decaying organic matter, stored products, and animal nests. Some species are considered pests in food storage facilities, though they feed on mold growing on products rather than the products themselves. The genus contains numerous species, with significant historical taxonomic confusion.

  fungivoredecomposersynanthropicstored-product-pestcosmopolitansilken-fungus-beetle

• Cryptophagus acutangulus

  Acute-angled Fungus Beetle, Silken Fungus Beetle

  Cryptophagus acutangulus is a small mycophagous beetle in the family Cryptophagidae, commonly known as the acute-angled fungus beetle or silken fungus beetle. The species has a nearly cosmopolitan distribution, occurring across Europe, Asia, Africa, and the Americas, though it is most abundant in temperate and boreal forest zones. It feeds primarily on fungi, with larvae and adults consuming fungal spores and hyphae. The complete life cycle from egg to adult has been described, and the species plays a documented role in fungal spore dispersal through internal and external transmission mechanisms.

  mycophagousfungus-feedingspore-dispersalsynanthropiccosmopolitandecomposer

• Cryptopidae

  Bark Centipedes

  Cryptopidae is a family of scolopendromorph centipedes characterized by complete absence of eyes (lacking ocelli) and possessing 21 pairs of legs as adults. The family is dominated by the genus Cryptops, which comprises over 150 species worldwide. Members are commonly known as bark centipedes and occur across diverse geographic regions, with some species showing strong synanthropic tendencies and human-mediated dispersal.

  centipedesmyriapodsblindsoil-dwellingsynanthropiccryptopidsscolopendromorphahorticultural-tradebiological-invasion

• Ctenolepisma

  Ctenolepisma is a genus of primitive wingless insects in the order Zygentoma, family Lepismatidae. The genus comprises approximately 75 extant species distributed nearly worldwide in warm regions, with some species occurring both indoors and outdoors while others are found exclusively in natural habitats. Unlike the closely related silverfish (Lepisma saccharina) and firebrat (Thermobia domestica), many Ctenolepisma species are less dependent on human habitation. Australia lacks native species but hosts introduced populations. The genus has undergone taxonomic revision, with ICZN Opinion 2427 (2018) establishing the neuter gender of Lepisma and related genera, resulting in species epithet changes such as Ctenolepisma longicaudatum (formerly longicaudata).

  primitive-insectsilverfishsynanthropicstored-product-pestmuseum-pestnocturnalametabolous

• Ctenolepisma longicaudatum

  gray silverfish, long-tailed silverfish, paper silverfish

  Ctenolepisma longicaudatum is a synanthropic silverfish species first described from South Africa in 1905, now distributed worldwide in human dwellings. It has become a significant indoor pest in Europe since the early 2000s, particularly in newly constructed buildings with stable climates. The species damages cellulose-based materials including books, documents, and textiles, and can survive extended periods without food.

  synanthropicpestinvasivecultural-heritage-pestcellulose-feedingametabolousnocturnal

• Desidae

  intertidal spiders, desid spiders

  Desidae is a family of spiders with remarkable ecological diversity, ranging from truly marine intertidal species to inland web-builders. The family was historically defined by intertidal members of the genus Desis, which construct air-filled silk retreats in barnacle shells or kelp holdfasts to survive tidal submersion. Modern circumscription includes inland genera such as Badumna and Phryganoporus. The family contains 63 genera and over 320 species, with the majority native to Australia, New Zealand, and New Caledonia. Some species have become invasive synanthropes, establishing populations in North and South America, Europe, and Asia.

  intertidalmarine-spidersheet-websocial-spiderinvasivesynanthropicAustralasiaSouth-Americakelp-associatedcoral-reef

• Dictis striatipes

  Striped Spitting Spider

  Dictis striatipes is a spitting spider in the family Scytodidae, known for the common name "Striped Spitting Spider." The species has been introduced to regions outside its native range, including Hawaii, Mexico, and Yemen. As a member of Scytodidae, it possesses the characteristic spitting ability that defines this family—immobilizing prey by ejecting a mixture of silk, venom, and adhesive from the chelicerae. It is a synanthropic species often found in human-modified environments.

  spitting-spidersynanthropicintroduced-speciestropicalnocturnal

• Echidnophaga gallinacea

  hen flea, sticktight flea, stickfast flea

  Echidnophaga gallinacea is a small, dark brown flea that parasitizes a broad range of bird and mammal hosts including poultry, dogs, cats, and occasionally humans. Adult females embed permanently into host skin—typically on bare areas of the head and face—using a serrated mouthpart to feed on blood, while males remain mobile. Heavy infestations cause ulceration, dermatitis, anemia, and can be fatal to young or small hosts. The species has spread globally through poultry farming and is now established across tropical, subtropical, and temperate regions.

  fleaectoparasitepoultry-pestvectorinvasivecosmopolitanintegrated-pest-managementcage-free-poultrybackyard-chickenshematophagypermanent-attachmentsessile-femaleresilinjumpingctenidia-absentanaemiadermatitisulcerationRickettsiaBartonellaplaguediatomaceous-earthmaldisonpesticide-resistanceorganic-farminganimal-welfareeconomic-entomologyveterinary-entomologyhost-generalisturban-wildlife-interfacesynanthropic

• Embidopsocus needhami

  Embidopsocus needhami is a small, wingless barklouse in the family Liposcelididae, widely distributed across North America. It belongs to a group of psocids commonly known as booklice or barklice, characterized by reduced or absent wings and flattened bodies adapted for living in tight spaces. The species has been recorded from the United States and Canada.

  apterousdetritivorestored-product-pestNorth-Americasynanthropic

• Eratigena duellica

  Giant House Spider

  Eratigena duellica, commonly known as the giant house spider, is a funnel weaver spider in the family Agelenidae. Originally described from Europe, it has been introduced to western North America, where it is established in British Columbia, Washington, and Oregon. The species was transferred from the genus Tegenaria to Eratigena in 2013, and was restored as a distinct species separate from E. atrica in 2018 after being considered conspecific. It is one of the largest house-dwelling spiders in its range and constructs characteristic funnel-shaped webs.

  funnel-weaverhouse-spiderintroduced-speciessynanthropic

• Eristalinus taeniops

  band-eyed drone fly, stripe-eyed lagoon fly, tiger fly

  Eristalinus taeniops is a hoverfly (family Syrphidae) native to the Palearctic and Afrotropical regions that has become established as an exotic species across much of the world, including North and South America. Adults are notable pollinators with distinctive banded compound eyes featuring five vertical dark stripes, and they exhibit Batesian mimicry of bees and wasps. The species is strongly associated with human-modified environments and has shown rapid geographic expansion in South America via airports and seaports.

  exoticinvasive-potentialpollinatormimicrysynanthropic

• Eudasyphora

  Eudasyphora is a genus of muscid flies established by Townsend in 1911. The genus contains at least seven described species distributed primarily across Europe and North America. Eudasyphora cyanicolor, the best-studied species, has been the subject of genome sequencing research. Members of this genus are synanthropic and frequently associated with human dwellings.

  synanthropicmetallic-colorationoverwinteringgenome-sequencedtaxonomic-debate

• Eustala

  humpbacked orb-weavers

  Eustala is a genus of orb-weaver spiders in the family Araneidae, first described by Eugène Simon in 1895. As of November 2024, the genus contains 87 species distributed primarily across the Americas, from the United States through Central America to South America, with highest diversity in Brazil, Uruguay, and Argentina. Several species have been documented exhibiting specialized ecological relationships, including myrmecophily (living among ants) in Central American species that inhabit ant-defended acacia plants. The genus includes the well-known humpbacked orb-weaver, Eustala anastera, found across North and Central America.

  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htperchroostnestdenburrowtunneldigexcavateminequarryextractremoveeliminateeradicateexterminatedestroydemolishruinwreckdamageharminjurehurtwoundmaimcripplelamedisableincapacitateparalyzestunshockastonishamazeastoundstaggerstupefydazebewilderconfusepuzzleperplexbafflemystifyenigma

• Evarcha proszynskii

  Proszynski's Jumping Spider

  Evarcha proszynskii is a Holarctic jumping spider species first described from Russia in 1998. It occurs across northern Eurasia from Russia through Japan, and has established populations in western North America. The species is primarily diurnal but has been observed sheltering on building exteriors at night. Like other salticids, it hunts by sight without using webs.

  jumping-spiderSalticidaeHolarcticdiurnalbuilding-dwellingsynanthropic

• Fannia canicularis

  Lesser House Fly, Little House Fly

  Fannia canicularis, the lesser house fly, is a small dipteran (3.5–6 mm) widespread in association with human habitation and livestock facilities. It is distinguished by its habit of circling in the centers of rooms and its slender build with a straight median wing vein. The species is a significant pest in poultry operations, where larvae develop in accumulated manure. Males exhibit complex swarming behavior in shaded, enclosed sites, performing aerial chases controlled by precise visual-motor mechanisms. Among Fanniidae, this species is most frequently associated with myiasis.

  synanthropicpestpoultry-pestmyiasis-associatedswarming-behaviorvisual-motor-control

• Fannia fuscula

  Fannia fuscula is a species of lesser house fly in the family Fanniidae. It is a small, grayish fly distributed across northern Europe and parts of North America. The species belongs to a genus commonly associated with decaying organic matter and synanthropic environments. Like other Fannia species, it is often found in and around human structures.

  synanthropicdecomposernuisance-pestPalearcticNearctic

• Fannia pusio

  Chicken Dung Fly

  Fannia pusio is a small calyptrate fly in the family Fanniidae, commonly known as the chicken dung fly. Native to Central and North America, it has achieved near-global distribution through human-mediated dispersal associated with livestock. The species is notable for its synanthropic association with poultry facilities, where it can reach nuisance-level populations. It has forensic significance as a colonizer of decomposing remains, including buried corpses inaccessible to larger flies, and serves as a developmental indicator for post-mortem interval estimation. Females also function as phoretic hosts for Dermatobia hominis eggs, linking the species to veterinary and medical myiasis cases.

  forensic-entomologysynanthropicpoultry-pestmyiasis-vectorphoresytemperature-dependent-developmentcosmopolitan-distributionnutrient-cyclingcarrion-colonizerburied-remains-indicator

• Filistatidae

  crevice weavers

  Filistatidae are cribellate spiders commonly known as crevice weavers, characterized by their distinctive silk-producing anatomy and retreat-building behavior. Members of this family possess a cribellum—an additional silk-spinning organ—and a calamistrum, a comb of curved hairs on the fourth leg used to card silk into a non-sticky, highly entangling web structure. The family includes synanthropic species that frequently inhabit human structures, as well as species restricted to natural habitats such as arid and semi-arid regions.

  spidercribellatehaplogynecrevice-weaversynanthropic

• Hasarius adansoni

  Adanson's house jumper

  Hasarius adansoni is a small jumping spider (Salticidae) with pronounced sexual dimorphism. Females reach 8 mm, males 6 mm. Males display distinctive black coloration with a red facial 'mask', white pedipalps, and iridescent white markings on the abdomen. The species is strongly associated with human structures across tropical and subtropical regions worldwide, and has been introduced to temperate areas via greenhouses. It constructs silk retreats at night, approximately twice its body length.

  jumping-spidersynanthropicsexual-dimorphismcosmopolitangreenhouse-introduced

• Herpyllus cockerelli

  Herpyllus cockerelli is a ground spider in the family Gnaphosidae, distributed across the United States and Mexico. Like other Herpyllus species, it is nocturnal and frequently associated with human structures. The species was described by Nathan Banks in 1901.

  ground-spidernocturnalsynanthropicparson-spider

• Heteroonops spinimanus

  Heteroonops spinimanus is a small spider in the family Oonopidae (dwarf goblin spiders), first described by Eugène Simon in 1892. The species has a notably broad distribution, having been recorded across the Americas and subsequently introduced to multiple regions worldwide including Europe, Africa, and the Pacific. Its wide geographic spread suggests human-mediated dispersal, though specific transport mechanisms remain undocumented. As a member of Oonopidae, it belongs to one of the most species-rich spider families, characterized by minute body size and simplified eye arrangements.

  spiderintroduced-speciestramp-speciesOonopidaedwarf-goblin-spidersynanthropic

• Hofmannophila

  brown house moth (for sole species H. pseudospretella)

  Hofmannophila is a monotypic genus of concealer moths (family Oecophoridae) containing a single species, H. pseudospretella, commonly known as the brown house moth. The genus appears closely related to Borkhausenia. The sole species is a significant synanthropic pest with nearly worldwide distribution, particularly abundant in Britain.

  synanthropicpestkeratinophagouscosmopolitanmonotypic-genus

• Hydrotaea aenescens

  black dump fly, black garbage fly, dump fly

  Hydrotaea aenescens, commonly known as the black dump fly or black garbage fly, is a muscid fly native to the New World that has become invasive in Europe. The species is notable for its predatory larvae that feed on house fly (Musca domestica) larvae, making it a candidate for biological control programs in livestock facilities. Adults have been documented as vectors of human botfly eggs. The species exhibits rapid range expansion in Europe, with records extending to the Far North of European Russia.

  invasive-speciesbiological-controlpredatorlivestock-pestsynanthropic

• Hydrotaea ignava

  black garbage fly

  Hydrotaea ignava is a muscid fly commonly known as the black garbage fly. It is native to Europe, with records from Portugal (including the Azores and Madeira), Denmark, and Norway. The species breeds in moist organic matter, particularly manure and decaying material in confined animal facilities. Its larvae are predatory on other fly larvae, including house fly maggots, and have been used in biological control programs. Adults are distinguished by their shiny bronze-black coloration and habit of remaining on food sources at night rather than dispersing to ceilings or vegetation.

  predatory-larvaemanure-breedinglivestock-pestbiological-control-agentsynanthropic

• Hypoponera punctatissima

  Roger's ant

  Hypoponera punctatissima, commonly known as Roger's ant, is a small ponerine ant native to Africa that has become a globally distributed tramp species. The species is strongly associated with human-modified environments, particularly heated buildings, greenhouses, and animal waste. Colonies are small, typically containing approximately 200 workers, and are often polydomous. The species is frequently encountered through alate gynes that appear above ground.

  tramp-speciessynanthropicponerineinvasive

• Icius subinermis

  Icius subinermis is a jumping spider native to the western Mediterranean region. It shows sexual dimorphism in coloration. The species favors moist habitats near water sources, where it constructs silken retreats in vegetation or under rocks. It has been introduced to several locations outside its native range, including greenhouses in Germany and an established population in Philadelphia, Pennsylvania.

  jumping-spiderintroduced-speciessexual-dimorphismsynanthropic

• Kukulcania

  Crevice Weavers

  Kukulcania is a genus of crevice weaver spiders in the family Filistatidae, first described by Pekka T. Lehtinen in 1967 and named after Kukulkan, a Mesoamerican serpent deity. The genus contains fifteen species distributed across the Americas, from the United States through Mexico and Central America to South America. These spiders are characterized by their cribellate silk production and distinctive sexual dimorphism. The most widespread species, Kukulcania hibernalis, is highly synanthropic and has been introduced to multiple regions outside its native range.

  cribellatesexual-dimorphismsynanthropicintroduced-speciessilk-mechanicsmedical-misidentification

• Kukulcania arizonica

  Arizona black hole spider

  Kukulcania arizonica is a crevice-weaving spider native to the southwestern United States, commonly known as the Arizona black hole spider. Females are velvety black with a compact, tarantula-like body form and can live for several years, reaching approximately 13 mm in body length. Males are dramatically different in appearance—pale beige or brown with small bodies and disproportionately long legs. The species constructs distinctive lacy, non-sticky webs that radiate from a silken tube retreat, typically built in crevices on building walls or similar structures. The spider belongs to the cribellate lineage, possessing specialized silk-producing structures that produce entangling rather than adhesive capture threads.

  spidercribellatecrevice-weaversynanthropicsouthwestern-United-Statessexual-dimorphismFilistatidae

• Kukulcania hibernalis

  Southern House Spider

  Kukulcania hibernalis, commonly known as the Southern House Spider, is a large cribellate spider native to coastal eastern Mexico and the eastern United States. The species exhibits extreme sexual dimorphism: mature females are velvety black or dark gray with a tarantula-like body shape and lumpy eye arrangement, while males are pale beige or brown with small bodies and extremely long legs. Females construct sprawling, lacy, non-sticky webs around tubular retreats on buildings, using specialized cribellar silk with extreme extensibility achieved through a hierarchical loops-on-loops structure. The species is synanthropic and has been introduced widely across the Americas, the Caribbean, Liberia, and the Canary Islands.

  cribellate-spidersynanthropicsexual-dimorphismsilk-mechanicsintroduced-specieshouse-spider

• Kukulcania hurca

  crevice weaver

  Kukulcania hurca is a species of crevice weaver spider in the family Filistatidae. It is native to the United States and Mexico. Like other members of its genus, it constructs distinctive lacy, cribellate webs in sheltered locations. The species exhibits pronounced sexual dimorphism, with females appearing velvety black or dark gray and males being pale with elongated legs.

  crevice-weaverfilistatidcribellate-spidersexual-dimorphismautospasysynanthropic

• Latridiidae

  minute brown scavenger beetles, fungus beetles

  Latridiidae is a cosmopolitan family of minute beetles containing approximately 1,050 described species in 29 genera, though true diversity is likely much higher. Adults range from 1.2 to 2 mm in length and are uniformly brown to black in coloration. The family is divided into two subfamilies: Latridiinae (glabrous, heavily sculptured dorsal surface, smooth pronotal margin) and Corticariinae (finely pubescent, lightly sculptured, serrate pronotal margin). Both adults and larvae are obligate mycetophages, feeding exclusively on fungal hyphae and spores.

  mycetophagouscrypticsaproxylicsynanthropicmicrohabitat-specialist

• Latrodectus

  widow spiders, black widow spiders, brown widow spiders

  Latrodectus is a genus of cobweb spiders (Theridiidae) containing approximately 34-35 species distributed worldwide except Antarctica. Females are typically dark-colored with distinctive reddish ventral abdominal markings, often hourglass-shaped, while males and juveniles frequently display dorsal red or red-and-white patterns. The genus is medically significant due to potent venom containing the neurotoxin latrotoxin, which causes the condition latrodectism. Despite their reputation, bites rarely cause death in humans. The common name "widow spiders" derives from observations of sexual cannibalism, though this behavior is more common in laboratory settings than in nature.

  medically-significantvenomouscobweb-spidersexual-cannibalismintroduced-speciessynanthropicneurotoxic-venomlatrotoxinlatrodectismcomb-footed-spider

• Lepismatidae

  Typical Silverfishes

  Lepismatidae is a family of primitive, wingless insects in the order Zygentoma, containing approximately 190-340 described species worldwide. The family includes the two most familiar domestic species: the silverfish (Lepisma saccharina) and the firebrat (Thermobia domestica). These ancient insects represent some of the earliest diverging lineages within Insecta, with origins dating back hundreds of millions of years. Members are characterized by elongated, flattened bodies covered in scales, three caudal filaments, and a complete absence of wings throughout their life cycle.

  primitive-insectswinglesssynanthropichousehold-pestdetritivorenocturnalancient-lineagesilverfishfirebratZygentoma

• Lithobius melanops

  Garden Lithobius, European steppe centipede

  Lithobius melanops is a small stone centipede in the order Lithobiomorpha, native to Europe but introduced to many regions worldwide. Adults measure 11–17 mm in length with a dorsoventrally flattened, fusiform body. The species is distinguished by a combination of morphological traits including 32–44 antennal articles, 10–13 ocelli with a notably enlarged posterior ocellus, and specific tergite projections. It inhabits dry, open habitats and is a nocturnal predator of soil invertebrates.

  centipedestone-centipedegardencosmopolitanhemianamorphicnocturnalpredatorsynanthropic

• Loxosceles

  Recluse Spiders, Brown Spiders, Fiddle-backs, Violin Spiders, Reapers

  Loxosceles is a genus of venomous spiders in the family Sicariidae, comprising approximately 149 species of cryptic, reclusive, nocturnal arachnids. These spiders are characterized by their six eyes arranged in three pairs, a distinctive violin-shaped marking on the cephalothorax in many species, and cytotoxic venom that can cause necrotic lesions in some bite victims. The genus has a primarily neotropical distribution, with significant diversity in Brazil and the southwestern United States, though some species have been introduced to other regions through human activity.

  spidersvenomousmedically-significantnocturnalsynanthropiccryptichaplogyne

• Loxosceles devia

  Texas Recluse

  Loxosceles devia, commonly known as the Texas recluse, is a species of recluse spider in the family Sicariidae. It is native to the southern United States and Mexico. Like other members of the genus Loxosceles, it possesses venom that can cause necrotic skin lesions in humans, though bites are rare and typically occur only when the spider is trapped against skin. The species is closely related to other recluse spiders and shares their characteristic shy, reclusive behavior.

  medically-significantvenomoussynanthropicnocturnalreclusive

• Loxosceles rufescens

  Mediterranean recluse spider, violin spider, brown spider

  Loxosceles rufescens is a globally invasive recluse spider native to the Mediterranean region. It has established populations across six continents through human-mediated dispersal, often in synanthropic environments. The species is medically significant due to cytotoxic venom containing phospholipases D that can cause loxoscelism—characterized by dermonecrosis, hemolysis, and potential systemic complications. Despite its fearsome reputation, bites are defensive and relatively uncommon even where populations are established.

  medically-significantinvasive-speciessynanthropicvenomousnocturnalcosmopolitan-distribution

• Machilinae

  Machilinae is a subfamily of bristletails within the family Machilidae, comprising one of the two major lineages of the jumping bristletail family. Members are small, wingless insects with the characteristic arched thorax and springing organ (furcula) that enables their distinctive jumping locomotion. The subfamily has been historically distinguished from the other machilid subfamily, Petrobiinae, primarily by subtle differences in abdominal appendage structure and scale patterns. Machilinae species are found across temperate and Mediterranean regions, often occupying rocky, coastal, or urban habitats.

  bristletailprimitive-insectwinglessrocky-habitatnocturnaljumperdetritivoreametaboloussynanthropic

• Menemerus semilimbatus

  Half-edged Wall Jumping Spider

  Menemerus semilimbatus is a medium-sized jumping spider in the family Salticidae, commonly known as the Half-edged Wall Jumping Spider. It is characterized by its dorso-ventrally flattened body, grayish-white coloration with distinctive V-shaped markings on the abdomen, and preference for vertical surfaces. The species is native to the Mediterranean region but has been introduced to parts of the Americas including Argentina, Chile, and the United States.

  jumping-spidersalticidsynanthropicwall-dwellingintroduced-speciesMediterranean-native

• Micropholcus

  cellar spiders

  Micropholcus is a genus of cellar spiders (Pholcidae) characterized by long legs and relatively fragile bodies. It is one of only two pholcid genera with both Old and New World distributions, though morphological and ecological differences exist between geographic groups. The genus currently contains at least 29 species, with major taxonomic revisions in 2014 (transfers from Leptopholcus) and 2024 (description of twelve new Old World species). The type species M. fauroti has a pantropical distribution and has been introduced globally.

  Pholcidaecellar-spiderspantropicalsynanthropiccave-dwellingOld-WorldNew-Worldinvasive-speciesparasitoid-host

• Micropholcus fauroti

  cellar spider

  Micropholcus fauroti is a cellar spider (family Pholcidae) with a pantropical distribution. The species has been introduced to Europe, with established records in Belgium and Germany. Approximately 87% of global records fall between the Tropics of Cancer and Capricorn. It is a small-bodied spider associated with human-modified environments in its introduced range.

  pantropicalintroduced-speciessynanthropicEuropePholcidae

• Modisimus culicinus

  cellar spider

  Modisimus culicinus is a cellar spider (family Pholcidae) native to South America that has become established across tropical and subtropical regions worldwide through human-mediated dispersal. It is considered a pantropical, synanthropic species strongly associated with human structures. The species was previously classified under the genus Hedypsilus, which has been synonymized with Modisimus.

  synanthropicinvasivepantropicalcellar-spider

• Musca

  house flies, face flies

  Musca is a genus of calyptrate flies in the family Muscidae, containing approximately 70 species worldwide. The genus includes Musca domestica, the common house fly, one of the most widespread and synanthropic insects on Earth. Musca species are characterized by their association with human habitation and livestock, with larvae developing in decaying organic matter. Adults are medium-sized, robust flies with distinctive head morphology including aristate antennae and well-developed chaetotaxy.

  synanthropicvectorlivestock-pestdecomposercalyptratemodel-organisminsecticide-resistancewaste-recycling

• Musca domestica

  house fly, common house fly

  Musca domestica is a cosmopolitan synanthropic fly and the most abundant insect in confined cattle operations. Adults are small (6–7 mm), gray with four dark longitudinal stripes on the thorax and creamy yellow abdominal sides. They do not bite but feed on blood, sweat, tears, saliva, and other bodily fluids, causing cattle to exhibit defensive behaviors including ear flapping, head shaking, and feeding hesitancy. The species completes development from egg to adult in as little as two weeks under optimal conditions, with up to 12 generations annually in temperate climates. Females deposit 75–150 eggs per batch in decaying organic matter, particularly manure and rotting vegetation. House flies are mechanical vectors of over 200 pathogens including E. coli, and can infest cattle wounds with maggots.

  synanthropicpestvectorlivestockmanurewaste-recyclinginsecticide-resistancedipteramuscidae

• Muscidae

  House Flies and Allies, House Flies, Stable Flies

  Muscidae is a family of flies in the superfamily Muscoidea containing nearly 4,000 described species across over 100 genera. The family exhibits diverse feeding strategies: adults may be predatory, hematophagous, saprophagous, or feed on plant and animal exudates including sugar, sweat, tears, and blood. Larvae develop in varied habitats including decaying vegetation, soil, carrion, and freshwater. While some species are synanthropic and of medical importance, most species are not associated with human habitation.

  fliesDipterahouse-fliesstable-fliessynanthropicvectorsdecomposersforensic-entomologylivestock-pestscalyptrate

• Muscina

  false stable flies

  Muscina is a genus of muscid flies comprising approximately 27 species with worldwide distribution. The genus includes several synanthropic species frequently associated with livestock facilities, manure, and human structures. M. stabulans (false stable fly) is the most extensively studied species, serving as a model for flight biomechanics research and forensic entomology. Members of this genus are notable for their epidemiological significance as mechanical vectors of pathogens, forensic utility in post-mortem interval estimation, and facultative predatory behavior by third-instar larvae.

  synanthropicforensic-entomologyvectorpredatordecomposerlivestock-pestmedical-entomologyflight-biomechanics-model

• Muscina stabulans

  False Stable Fly

  Muscina stabulans, commonly known as the false stable fly, is a cosmopolitan synanthropic muscid fly distributed worldwide. Adults are medium-sized flies averaging 8 mm in length, distinguished by four dark thoracic stripes, partially reddish-brown legs, and a pale spot above the thorax. The species exhibits strong synanthropic tendencies, with higher abundance in urban-suburban environments compared to rural areas. It has significant economic and public health importance as a mechanical vector of pathogens, a facultative predator of house fly larvae in poultry facilities, and a forensic indicator species for post-mortem interval estimation. Rare cases of intestinal myiasis in humans have been documented.

  synanthropicforensic-entomologymyiasisbiological-controlvectorcarrion-associatedpoultry-pest

• Muscinae

  Muscinae is a subfamily of muscid flies (Diptera: Muscidae) comprising approximately 10 genera and numerous species worldwide. The group includes well-known species such as the house fly (Musca domestica) and related genera including Pyrellia, Ophyra, and Orthellia. Members are characterized by specific morphological features of the adult and immature stages that distinguish them from the sister subfamily Stomoxyinae. The subfamily has significant sanitary and forensic importance due to the synanthropic habits of several species.

  DipteraMuscidaehouse-fliessynanthropicforensic-entomologymedical-entomologymyiasisdecomposers

• Nemapogon granella

  European grain worm, European grain moth

  A small tineid moth with a wingspan of 10–18 mm, native to the western Palearctic but distributed globally through human activity. Adults display irregular black, white, and grey mottling on the forewings with distinctive black spots along the leading edge. Larvae feed on bracket fungi in natural settings and various stored organic materials in human-associated environments. The species is the type species of genus Nemapogon and subfamily Nemapogoninae.

  fungus-mothstored-product-pestbracket-fungus-feedersynanthropicwestern-Palearctic-nativecosmopolitan-introduced

• Nesticodes rufipes

  Red House Spider

  Nesticodes rufipes, commonly known as the Red House Spider, is a cobweb spider in the family Theridiidae and the sole species in its genus. It has been introduced globally and is found on multiple continents including North America, South America, and oceanic islands. The species has been studied extensively for its predatory behavior, exhibiting a type II functional response to prey density. Research indicates that habitat complexity significantly affects its predation efficiency, with reduced capture rates in more complex environments due to prey refuge availability.

  Theridiidaecobweb-spiderintroduced-speciesfunctional-responsepredator-prey-dynamicssynanthropicbiological-controlcompetitive-interactionLatrodectuspoultry-house-pest-management

• Nycteola

  Nycteola is a genus of spiders in the family Nucteniidae. These spiders are nocturnal orb-weavers that construct webs under eaves and near artificial light sources. They are typically found in association with human structures and buildings.

  spiderorb-weavernocturnalsynanthropicarachnid

• Oecobiidae

  disc web spiders, flatmesh weavers, wall spiders

  Oecobiidae is a family of araneomorph spiders containing approximately 130 described species across seven genera. Members are small to moderately sized (2–20 mm body length) and are commonly known as disc web spiders or wall spiders due to their characteristic flat, star-shaped webs constructed on vertical surfaces. The family exhibits distinctive morphological traits including evenly radiating leg placement around the prosoma and a characteristic anal gland bearing a tuft of long hairs. Many species are synanthropic, occurring in and around human dwellings, while others inhabit desert or rocky environments.

  cribellateecribellatesynanthropicant-predatorwall-spiderdisc-weburban

• Oecobius cellariorum

  wall spider

  Oecobius cellariorum is a small spider in the family Oecobiidae, commonly known as wall spiders. The species is native to the Mediterranean region and has been introduced to North America and East Asia. It is frequently found in human-built structures.

  spidersynanthropicintroducedcosmopolitanMediterranean-native

• Oecobius maculatus

  Oecobius maculatus is a small spider in the family Oecobiidae, commonly known as wall spiders or disc web spiders. Native to the Mediterranean region extending to Azerbaijan, it has been introduced to the United States and Mexico. The species is characterized by its flattened body form and association with human structures.

  spiderwall-spiderintroduced-speciessynanthropic

• Oecobius navus

  wall spider, baseboard spider, stucco spider

  A small cribellate spider, 2–2.5 mm in body length, native to Europe and Northern Africa but introduced globally. Builds flat, circular webs with lateral openings on artificial structures. Uses an unusual hunting method: running around prey to entangle it in sticky silk ribbons from the anal tubule and spinnerets before biting.

  spidercribellateurbancosmopolitanintroduced-specieswall-dwellingsynanthropic

• Oinophila

  Oinophila is a small genus of fungus moths in the family Tineidae, subfamily Hieroxestinae. The genus name derives from Greek roots meaning "wine-lover," reflecting the association of its best-known species with wine cellars. The genus contains four nominal species, though two are provisionally placed and may not belong to this genus or even to Hieroxestinae. The most notable species, Oinophila v-flava, is commonly known as the wine moth.

  TineidaeHieroxestinaefungus-mothwine-mothstored-productcork-pestmold-feedersynanthropic

• Oinophila v-flava

  Yellow V Moth

  A small tineid moth with a wingspan of approximately 10 mm, widespread across temperate zones worldwide. Adults are active in the evening during summer months in western Europe. The species has established populations in New Zealand since 2001.

  synanthropicpestwine-cellarTineidaestored-product-pest

• Oniscus asellus

  common woodlouse, common shiny woodlouse, European sowbug

  Oniscus asellus is a large terrestrial isopod native to Western and Northern Europe, and one of the most widespread woodlouse species in the British Isles. It reaches up to 16 mm in length and inhabits diverse moist environments, including rotting wood, gardens, and human structures. The species exhibits biphasic moulting, consuming its shed exoskeleton, and has been documented to fragment weathered polystyrene plastic into microplastics. Two subspecies are recognized: the widespread O. a. asellus and the smaller, more colorful O. a. occidentalis in western France and southeastern Britain.

  detritivorebioindicatorterrestrial-crustaceansynanthropicmicroplasticheavy-metal-accumulatorbiphasic-moulting

• Opilio

  Opilio is a genus of harvestmen (order Opiliones, family Phalangiidae) containing over 60 described species. The genus name derives from Latin "opilio," meaning shepherd or sheep-master. These arachnids are characterized by long legs and a compact, oval body, with species distributed across the Holarctic region. The type species, Phalangium opilio, is a widespread synanthropic predator that has been introduced to North America and other regions.

  harvestmandaddy-longlegsarachnidPhalangiidaeHolarcticsynanthropic

• Ornithonyssus bacoti

  tropical rat mite

  Ornithonyssus bacoti, commonly called the tropical rat mite, is a hematophagous mesostigmatid mite in the family Macronyssidae. It is an obligate blood-feeding ectoparasite primarily associated with rats and other rodents, but will opportunistically bite humans and domestic animals when primary hosts are unavailable. The mite is of significant medical and veterinary importance due to its role in causing rat mite dermatitis in humans and its potential to vector several pathogens. It exhibits remarkable survival capabilities, traveling hundreds of feet to locate hosts and surviving extended periods without feeding.

  vectorzoonosisdermatitisurban-pestsynanthropicrodent-parasitemedical-entomologyveterinary-entomology

• Palorus ratzeburgii

  small-eyed flour beetle

  Palorus ratzeburgii, commonly known as the small-eyed flour beetle, is a darkling beetle in the family Tenebrionidae. It belongs to a genus associated with stored products and grain storage environments. The species is part of a group of beetles often found in human-modified habitats related to food storage.

  stored-product-pestgrain-pestdarkling-beetlesynanthropic

• Parasteatoda

  Colourful Comb-footed Spiders

  Parasteatoda is a genus of comb-footed spiders (family Theridiidae) first described by Allan Frost Archer in 1946. The genus name derives from Greek "para-" (near) combined with the related genus Steatoda. Species in this genus are characterized by a teardrop-shaped or nearly spherical abdomen with highly variable coloration, and possess the comb-footed spines on the fourth leg typical of theridiids. The genus contains 42 species and one subspecies as of October 2025, distributed primarily across the Old World with many species in Asia and New Guinea, though several have been introduced to the Americas and Europe through human commerce. The best-known member, Parasteatoda tepidariorum (Common House Spider), has become a significant model organism for evolutionary developmental biology research.

  cobweb-weavercomb-footed-spidermodel-organismsynanthropiccosmopolitanOld-World-genus

• Parasteatoda tepidariorum

  Common House Spider, American House Spider, Domestic Spider, Common Gray House Spider

  Parasteatoda tepidariorum, the common house spider, is a small cobweb-weaving spider native to the Americas that has achieved cosmopolitan distribution through human commerce. It is strongly synanthropic, rarely found outside human-built structures. Females measure 5–8 mm in body length, males 3.8–4.7 mm, with variable coloration from tan to nearly black. The species constructs irregular three-dimensional webs in dark corners of buildings and has become a model organism for developmental biology research due to its short lifecycle, ease of laboratory culture, and accessible embryology.

  cobweb-spiderhouse-spidersynanthropicmodel-organismdevelopmental-biologycosmopolitanurban-wildlifebiological-control

• Phalangium opilio

  European Harvestman, Common Harvestman, Brown Harvestman, Daddy Longlegs

  Phalangium opilio is the most widespread harvestman species globally, native to Europe and much of Asia and introduced to North America, North Africa, and New Zealand. It is a synanthropic species that thrives in human-modified environments including agricultural fields, gardens, and urban green spaces. The species has become a model organism for arachnid developmental biology and comparative genomics due to its ease of laboratory culture and continuous life cycle. Adults are generalist predators and scavengers that contribute to biological pest control in agricultural systems.

  harvestmanmodel-organismbiological-controlsynanthropicnocturnalgeneralist-predatorHolarcticinvasiveagricultural-pest-controldevelopmental-biology

• Phidippus audax

  bold jumping spider, daring jumping spider, bold jumper

  Phidippus audax is a common North American jumping spider recognized by its iridescent green chelicerae and distinctive abdominal patterning. Adults range from 6–15 mm in body length, with females larger than males. The species is active during daylight hours, using exceptional stereoscopic vision to stalk and pounce on prey rather than building capture webs. It has been introduced to Hawaii, the Nicobar Islands, the Azores, and the Netherlands.

  jumping-spiderSalticidaepredatoragricultural-pest-controldiurnal-huntersynanthropicintroduced-speciesNew-Hampshire-state-spideriridescent-cheliceraevisual-predator

• Philoponella arizonica

  Philoponella arizonica is a species of crevice weaver spider in the family Uloboridae, first described by Gertsch in 1936. The species occurs in the southwestern United States and Mexico. Like other members of the genus Philoponella, it constructs characteristic sprawling, lacy cribellate webs that issue from retreats in crevices and sheltered locations. Females are notably long-lived and continue to molt after reaching sexual maturity, a trait shared only with mygalomorph spiders among arachnids.

  spiderarachnidcrevice-weavercribellatesexual-dimorphismsouthwestern-USAArizonaUloboridaenocturnalsynanthropic

• Pholcidae

  cellar spiders, daddy long-legs spiders, carpenter spiders, vibrating spiders, gyrating spiders

  Pholcidae is a large family of araneomorph spiders containing over 2,000 species across 94+ genera. Members are commonly known as cellar spiders or daddy long-legs spiders due to their extremely long, thin legs and tendency to inhabit dark, undisturbed spaces. The family exhibits remarkable diversity in habitat use, from caves and tropical forests to human dwellings, with some species showing specialized adaptations including troglomorphism and communal web-sharing. Several species have become globally distributed through human transport, notably Pholcus phalangioides.

  spidersarachnidsweb-buildingcave-dwellingsynanthropicbiological-controlurban-legend

• Pholcus phalangioides

  Long-bodied Cellar Spider, Cosmopolitan Cellar Spider, Daddy Long-legs Spider

  Pholcus phalangioides is a long-legged cellar spider native to Asia that has become cosmopolitan through human association. Females reach about 7-8 mm body length with legs 5-6 times longer; males are slightly smaller at 6-10 mm. The species is notable for building loose, irregular webs in dark indoor spaces and for its specialized predatory behaviors including web invasion and aggressive mimicry. It preys on other spiders—including dangerous species such as redbacks—and exhibits a distinctive whirling defense against predators. Despite common misconceptions, its bite is harmless to humans.

  spiderpholcidcellar-spidercosmopolitansynanthropicaraneophageaggressive-mimicryweb-invaderharmless-to-humansbeneficial-predatorbiomedical-silk-research

• Phoridae

  scuttle flies, humpbacked flies, coffin flies

  Phoridae is a family of small, hump-backed flies commonly known as scuttle flies, humpbacked flies, or coffin flies. The family contains approximately 4,000 described species in 230 genera, making it one of the most diverse families of Diptera. Members are characterized by their distinctive escape behavior of running rapidly across surfaces rather than flying, and by a pronounced thoracic hump visible in lateral view. The family exhibits extraordinary biological diversity, with lifestyles ranging from scavenging and fungivory to parasitism of social insects, including highly specialized ant parasitoids in the genus Pseudacteon that are used for biological control of invasive fire ants.

  scuttle-flieshumpbacked-fliescoffin-fliesDipteraparasitoidsmyrmecophilesforensic-entomologybiological-controldecomposerssynanthropic

• Physocyclus enaulus

  cellar spider

  Physocyclus enaulus is a cellar spider species in the family Pholcidae, described by Crosby in 1926. It is known from the southwestern United States and Mexico, where it occurs in human-modified environments. The species appears to occupy an ecological niche similar to the cosmopolitan Pholcus phalangioides in this region.

  Pholcidaecellar-spiderindoor-spiderNorth-Americasynanthropic

• Plexippus paykulli

  Pantropical Jumping Spider

  Plexippus paykulli is a cosmopolitan jumping spider native to Southeast Asia, now established across tropical and subtropical regions worldwide. Commonly called the pantropical jumping spider, it is strongly associated with human-built structures, particularly building exteriors near light sources where it hunts insects. The species exhibits pronounced sexual dimorphism: males display black bodies with bold white stripes, while females are brownish-grey with tan markings. It is an active diurnal predator that does not construct prey-capture webs, relying instead on acute vision, stalking, and jumping to subdue prey.

  jumping-spiderSalticidaecosmopolitansexual-dimorphismbiological-controlsynanthropicdiurnal-predator

• Polistes dominula

  European Paper Wasp

  Polistes dominula is a highly successful invasive social wasp native to Eurasia that has established populations across North America, South America, New Zealand, South Africa, and other regions. First detected in North America near Boston in 1978, it has become one of the most abundant wasps on the continent. The species builds small, exposed paper nests in protected locations and preys primarily on live insects, particularly caterpillars. Unlike yellowjackets, it does not scavenge for meat or sugar. Its rapid spread has been attributed to ecological flexibility, superior competitive ability, and tolerance of human-altered environments.

  invasive-speciessocial-wasppaper-wasppredatorpollinatorurban-ecologyeusocialnest-constructionbiological-controlthermal-biologyspatial-learningvibrational-communicationaposematismhonest-signaloverwinteringdiapausePolistesVespidaeHymenopteraNorth-AmericaEuropeNew-ZealandSouth-AfricaSouth-Americamonarch-butterflycaterpillar-predationnest-architecturegynefoundressdominance-hierarchyclimate-change-impactenergeticsmetabolic-ratemicroclimatesuburban-habitatanthropogenicornamental-pestvineyard-pestfruit-damagestinging-insectvenompoison-glandwarning-colorationZahavian-signalStrepsipteraparasitoidXenosbehavioral-plasticityforaginglearningmemorythermoregulationectothermyendothermysolar-radiationnest-temperaturebrood-developmentcolony-survivalmultiple-foundingsingle-foundingseason-lengthlatitudetemperateMediterraneanhibernacleoverwintering-costsclimate-warmingrange-expansioncompetitionnative-species-displacementbiodiversity-impactconservationmanagementcontrolintegrated-pest-managementIPMidentificationantennae-colorfacial-markingscastereproductionmalefemalesexual-dimorphismantennaeabdomenwingmandiblesalivapapercombcellpediceltrophallaxislarvapupaadultworkerqueensubordinatedominantaggressiondefensethreat-displaystingtoxicitybrightnesscolorationpredator-avoidancepreycaterpillarLepidopterabutterflymothgardenagriculturevineyardorchardurbansuburbanruralforesthabitat-preferencetemperaturemetabolismquiescencetorporsurvivalfitnesscolonynestpopulationabundancedistributionrangeexpansioninvasionestablishmentintroductionbiotic-interactiontrophic-cascadeherbivory-suppressionplant-fitnessmilkweedDanaus-plexippusmonarchNelsonTasmanecosystem-impactconservation-managementbiological-invasionecologybehaviorphysiologymorphologytaxonomysystematicsnomenclaturegender-agreementLatinChrist1791Vespa-dominulabasionymcatalogue-of-lifeGBIFiNaturalistobservationcitizen-sciencephotographyillustrationfield-guideorangeblackyellowredcolor-patternsizewing-lengthbodycompactlegsshortfacesquaretriangulardarkcurledstraightelbowedbluntpointedtipZahaviancostly-signalhuntforagenectarhoneydewaphidscale-insectflowergrapeumbelliferfennellovageinsectmeatballfeedemergechewcaphexagonalwood-fiberbarkexposedopenumbrellastalkantrepellentsubstancecoatprotectlocationeaveattictreebranchvineshrubcavitybird-boxbee-hiveshedgrave-lanternoverwintershelterprotectedthermalclimatecoldwinterspringsummerautumnfallseasonmonthdayactivitydefendthreatdisplayraisetiptoesocialdominancehierarchyreproductiveegglayfoundcooperatecompeteselfishpassive-aggressiveindividualrecognitionfacial-markingcognitionmushroom-bodybrainintelligentartistarchitectnavigationplasticityspatialrelocatingfoodresourcedishbaittrainingexperiencevibrationcommunicationsignalsubstrate-borneabdominalwaggingoscillationsecretionmodulationperceivereactmovementattentionfeedinginspectionbody-temperatureambientsolarradiationmetaboliccostenergeticexpenditureefficiencywarmingchangeimpactincreaseinvasivespreadsuccesscompetitiveabilityflexibilityadaptationreactionresponseconditionyearvariationproductivityfoundingsinglemultipleratebenefitcooperationpredationparasitismvesparumstylopidstylopizationparasitehostinfestationmiteAcariwaspflyeffectcommunitydeclineDanausplexippusmortalityinstarearlylatelargersmallervulnerableresistantdiscoverychancecontactdirectrecruitmentnestmatesitecascadingtrophiccascadeherbivorysuppressionplantgrowthproductionAsclepiasnetexclusionexperimentoutcomesuggestionstrongdetrimentalecosystemstrategymethoddevelopmentprotectionbiodiversityregionfirst2016recentestablishedexoticcongenerchinensislongercomparisonhigherlowergreatestareabuiltstructurenativeunsuccessfultranslocateunablethrivewarmerorigincontributorfactorresearchthesisinsightbehaviourknowledgedirectionaideffectivejournalpublicationDOI10.26686wgtn14538585v1UniversityWellingtonVictoriaMScstudentdissertationstudyinvestigationanalysisdatafieldresidentreportlocalindirectinteractionlevelfunctionserviceprovisionnaturalpestbiocontrolornamentaldecorativecropdamagefruitcherrywesternColoradoatleastripeningchoicepreferenceheightgroundstratamicrositeenvironmentclosedhabitatdensevegetationsurroundingbushPatagoniaArgentinaChileNWdetected2003sympatriccoexistenceoverlapminimalfacilitationbehavioralprocessinterspecificsemi-urbanpoorlystudiedspeciesHypodyneruslabiatusnewlightfindingcontributionunderstandingcollectinganthropizedhighlightimportanceconsiderationEthology10.1111eth13505abstractonlylimiteddetailfulltextrequiredcomprehensivesynthesisvibrationalwidespreadregulatecrucialconspicuousoscillatorywagstrictlyassociatedpresencesuggestedinvolvementadult-larvahypothesisshort-termtrophallacticexchangemodulatesalivarydecreaseamountpreparereceivestimulatereleaseelectro-magneticshakerassesstimerecordmeasureimmediatelyafterplaybackresultshowproducepossiblyorderattractduringneithernorsupportallegedrolelong-lastingExperimentalBiology10.1242jeb186247flexiblesystemexpandingNorthAmericacausestirfastuponexplanationpresentliteraturegoodinvadernorthernriselittleknownnestingCentralinvestigatebasicprincipleGermany49°grouponetofoursmallshorterthanothermeannewlyfounded83averagelength4.6prefer54%46%majorincreased47%single-foundresswhereas100%moretwohowevernonumbertermperobservewellthreeconsecutivegreatlydependingprecedingimplyremarkablyquicklyoutsiderapidcolderEcosphere10.1890es15-002541thermoregulatorypolistinedifferentcollectdemandbroodmainlyectothermictasklivingdifferingrevealenvironmentalinfluencewarmSoutherninfraredthermographyentireusually~20–40°CnearlylinearlythoraxwarmestpartachieveoptimalpreferablyusemodelenableevaluationendothermiceffortexhibitweakalmostconstantperformanceaboutcontrastmostlyminoravoidhighwayreduceInsects10.3390insects10070187traitstronglyComparativeB10.1007s00360-016-1041-xprovidedgallicusinsects14110849adverseweatherofferlowshelteredliveenergystoreItalyAustriadescribecalculateaccordingstandarddiffersignificantlybetween3.2±5.718.55.29variancecorrespondcloselymeteorologicalcumulativemass-specificoverperiodlowestcomparedbothacclimationcalculationup3duedramatic40%additionalexponentiallytemperature-dependentfluctuationdisproportionatelyJensen'sinequalitywoodenbirdboxemptybeehiveundergrapevinegravelanterncemeterybeginwhenexceed~18–20confidencenoteinformationinferredfromactivenotdiscussedthissourceassociationaddressedrelationshipinsects14110886thermophilicoriginatingbutnowwidelyquitesynanthropichumansettlementplacewithfavorabletypicalsidewasps'wide~20–37aboveairadvantageasacceleratespeeddidapproximately38.6managedbycoolingnear~1–2cmalwaysclearlyelevatedstationclimate-model-generatedmacroclimaterevealednecessitymeasuringforreliabledescriptioninsects'brighter-coloredpoisonglandFrontiersZoology10.11861742-9994-9-20aposmatismagainstconsistingwarningusingtoxincostlyphysicalcouldsimultaneouslyabundantstrikingsuchcaseindicateanimaltoxicalsowouldensurehonestlyexaminepositivecorrelationexistscollected30photographedthemvolumewidthremainedevencontrollingsuggestpatterntruesignpoisonoustheyhavetheoreticalpredictingindicatesquantitativewithinactingmetabolicallythereforelimitationfirst-yearSpainexactageunknownethanolpreservationmayalterapplieduniformlypseudoreplicationintraspecificsupportedwhilesuccessfullyworldwiderevisitingpreviouslygatheredflightmanipulationperformedtargetseveralvisitadditionallyanalysedealingpositionwhetherchoosevisitedcontainingoptnovelbaitedplaced60awaythentraineitheronceorcomparetakenfinddisplaceddemonstraterapidlylearnedreturncertainsignificantreductionlikewisemanipulatespendinglesseachmoreoverofferedjustmajorityfurthermorecontributebehaviouralconsideringmarginalisCapeProvinceSouthAfricaAfricanEntomology10.40010030220104CaucasianEntomologicalBulletin10.238851814-3326-2015-11-1-85-89degreeHungaryNaturaSomogyiensis10.24394natsom201119229manyEuropeancountryobserved1993documentationphotograph5ofexaminedstylopizedtheseexemplarparasitized18strepsipteranspecimensometaxonscientificnamerankpreferredcommonWonderfulWorldWaspsBugSquadArticleChrisAliceKratzerauthorLinkedInPhototerriblejam-packedpainangerloveusoutbluemindingownbusinesseatpicnicfrightenchildbuildhomecomplicatealready-stressfullifeEveryoneknowsbebetterwithoutSoprefacebookpublishedcompany2020OwlflyLLCwhatwritebelievepointessentialcomplicatedbeautifulIndeedplayimportantprovidebeneficialLookmapesticidelaborpassionatededicatedwrittenconversationaltonelongadmirersupporterwhogrewJerseycontinuerememberinteractingyesgettingstungassortedincludingcometerritorybecomeentomologistoptedengineerreceivedbachelorscience2019mechanicalengineeringRochesterInstituteTechnologyworkedYorkuntilTodayexecutivedirectormanagingdivisionPublishingopportunitydevelopmarketsustainablepotentialmitigationfascinatefoldintowantwhyhowdoiftellbuildingunderstandcycleorganismbeforetryingentangleecologicalmeaninginquilinecalledcuckooexploityoungcallfactcatchdismembertinywaistpreventeatingsoldfluidprimarymostgrasshoppercricketkatydidbeetleearthwormlanternflycockroachspidercicadaaren'tengineering-trainedprofessionalknowledgeablybeganher2018January25pathincludedholingCornellCollectionnetworkingexpertteachingherselfsoftwarealigngeneticbarcodespentclosethousandhourporingplatformidentifyingmappingstudyingcolorincredible400-pagebilledguideallarcticGreenlandAlaskatropicalPanamaGrenadacover20822generafeature900imagemacrophotographerpostingbringbackIowaStateProfessorAmyToth'sseminarDepartmentNematologytoldcrowdattackextremelycomplexfascinatingcreaturecoinedhashtagwasplovewroteillustratedItvarietyyellowjacketEurasianred-bandedAmericanblackjacketvolcanoGuatemalianEasternwidowpolka-dotprairieCaliforniaformdownyGermanknewthere'jacketsfamiliarelaborateknowdominulomeansmistressimpliesIntroduced1970ssincecontinentWomanLynnKimseyBohartMuseumdistinguishedtellingdifferencescavengertakeparticularlyseriousmentionUCStatewideIntegratedProgramwealthPestNotedistincttypefartroublesomeespeciallyground-cavity-nestingtendvigorouslydisturbedDefensiveincreasesprogressesscarcerprimarilystartaroundgarbagecandogcatwhereripeoverripeaccessiblelargecolorfultidbitsprinklethroughoutintriguingin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• Pseudeuophrys lanigera

  House Jumping Spider

  Pseudeuophrys lanigera is a small jumping spider native to southwestern Europe that has expanded its range northward and eastward since the mid-20th century. It is strongly associated with human structures, particularly in northern parts of its range where it is found almost exclusively indoors or on building exteriors. Adults are active year-round, including winter months. The species shows notable adaptation to dry, heated environments of modern concrete buildings.

  synanthropicjumping-spiderhousehold-spideryear-round-activity

• Psilochorus simoni

  Wine Cellar Spider

  Psilochorus simoni is a cellar spider in the family Pholcidae, native to subtropical America and introduced to Europe, Turkey, New Zealand, and Australia. The species is commonly known as the "Wine Cellar Spider" due to its historical association with wine cellars, though it has become established in garden centres and greenhouses. It constructs dome-shaped webs and has been recorded from cave environments in Europe, including Slovenia's Postonjska jama, where it shows morphological adaptations to subterranean life.

  cave-dwellingintroduced-speciessynanthropicPholcidaeglobal-distribution

• Ptinus variegatus

  Ptinus variegatus is a species of spider beetle in the family Ptinidae, first described by Rossi in 1792. It is a stored-product pest with a cosmopolitan distribution, having been introduced to North America from its native Palearctic range. The species is associated with dry organic materials including stored food products, dried plant matter, and animal remains. Like other Ptinidae, it undergoes complete metamorphosis with a cryptic larval stage.

  spider-beetlestored-product-pestcosmopolitandetritivoresynanthropic

• Pyralis farinalis

  meal moth

  Pyralis farinalis, the meal moth, is a cosmopolitan species in the family Pyralidae and the type species of its genus, tribe, subfamily, and family. Adults are recognized by their colorful upperwings and characteristic resting posture with the abdomen held at 90° to the body. The species is strongly synanthropic, associated with stored grain and food products worldwide, and completes its life cycle in approximately eight weeks with multiple generations per year. Larvae are significant pests of milled plant products, feeding on cereals, grains, and other stored foods.

  stored-product-pestsynanthropiccosmopolitangrain-pestinsect-teamultiple-generations-per-year

• Pyralis manihotalis

  Tropical Meal Moth

  Pyralis manihotalis is a small pyralid moth with a pan-tropical distribution, described by Achille Guenée in 1854. It is frequently associated with stored products and decaying organic matter, earning it the common name Tropical Meal Moth. The species has been documented in an unusually wide range of habitats, including caves where self-sustaining populations feed on bat guano. Adults are nocturnal and attracted to ultraviolet light.

  stored-product-pestpan-tropicalcave-dwellingdecomposersynanthropic

• Quedius cruentus

  orange-tipped rove beetle

  Quedius cruentus is a rove beetle in the family Staphylinidae, commonly known as the orange-tipped rove beetle. It is a medium-sized species with distinctive coloration that has been introduced to North America from its native Palearctic range. The species is frequently recorded and has established populations in northeastern North America.

  rove-beetleintroduced-speciesPalearctic-originNorth-Americasynanthropic

• Reduvius personatus

  Masked Hunter

  Reduvius personatus, commonly known as the masked hunter, is a cosmopolitan assassin bug recognized for the distinctive debris-camouflaged appearance of its nymphs. The species is a generalist predator of small arthropods and has been introduced to multiple continents through human activity. Adults are uniformly dark brown to black, winged insects measuring 17–22 mm, while nymphs appear gray or light-colored due to accumulated dust and lint on their bodies. Though beneficial as predators of household pests like bed bugs, they can deliver a painful defensive bite when mishandled.

  assassin-bugpredatorcamouflageindoorsynanthropicbiocontrolpainful-biteintroduced-speciesHolarctic

• Rhinotus

  Rhinotus is a genus of millipedes in the family Siphonotidae, order Polyzoniida, containing at least 20 described species. The genus includes notable cosmopolitan tramp species such as Rhinotus purpureus, which has been repeatedly described as new under multiple synonyms and is frequently associated with human-modified environments.

  millipedePolyzoniidaSiphonotidaetramp-speciessynanthropicgreenhousecosmopolitan

• Rhinotus purpureus

  purple millipede

  A small, cosmopolitan millipede species in the family Siphonotidae, native to the Neotropics but widely introduced globally through human commerce. Frequently found in greenhouses and other synanthropic habitats, it has been repeatedly described as new due to its variable appearance, resulting in over a dozen synonyms. First recorded from the Indian subcontinent in 2020.

  millipedepolyzoniidasiphonotidaetramp-speciescosmopolitangreenhousesynanthropicintroduced-speciesdetritivore

• Salticus scenicus

  Zebra Jumping Spider, Zebra Spider, Zebra Back Spider

  Salticus scenicus is a small jumping spider recognized by its bold black-and-white striped pattern. Adult females measure 4–7 mm in body length, males 4–6 mm. Males exhibit elongated chelicerae with long fangs used in combat with rival males. The species is native to Eurasia but has spread globally through human commerce, now common across temperate regions of North America and Europe. It is frequently observed on vertical surfaces such as walls and fenceposts in urban and suburban environments.

  jumping-spiderurbansynanthropicvisual-predatorsexual-dimorphism

• Sarcophaginae

  Typical Flesh Flies

  Sarcophaginae is a diverse subfamily of flesh flies comprising at least 60 genera and over 1,800 species worldwide, with the highest diversity in the Neotropical region. These calyptrate flies are characterized by their association with decomposing organic matter, including carrion, feces, and decaying material. Many species exhibit synanthropic behavior, thriving in human-modified environments. Their life histories encompass necrophagy, coprophagy, and scavenging, with some species documented in association with eusocial wasp nests. Species identification relies heavily on male genitalia due to uniform external chaetotaxy.

  DipteraSarcophagidaeflesh-fliescalyptrate-fliessynanthropicscavengersdecomposersforensic-entomologymedical-entomologyNeotropical-diversity

• Sceliphron

  black-and-yellow mud dauber wasps, black mud-dauber wasps, mud daubers

  Sceliphron is a genus of solitary sphecid wasps comprising 34 valid species, commonly known as black-and-yellow mud daubers or black mud-dauber wasps. Females construct nests from mud, building individual cells that they provision with paralyzed spiders as food for their larvae. The genus exhibits remarkable synanthropic behavior, with many species readily nesting on human structures. Several species have become invasive outside their native ranges, including S. caementarium (native to North America, now widespread globally) and S. curvatum (native to Central Asia, spreading through Europe and recently detected in North America).

  solitary-waspmud-daubersynanthropicspider-predatornest-parasiteinvasive-speciesurban-wildlifebeneficial-insect

• Sceliphron curvatum

  Asian mud-dauber wasp

  Sceliphron curvatum is a solitary mud-daubing wasp native to Central Asia that has become invasive in Europe and North America. First recorded in Europe in 1979, it has since expanded across multiple European countries and was first documented in North America in 2013. The species is smaller and darker than the native North American Sceliphron caementarium, with a body length of 15–25 mm and black coloration with yellow and red ornaments. It exhibits strongly synanthropic behavior, frequently nesting indoors on clothing, books, and furniture rather than exclusively on building exteriors.

  invasive-speciessynanthropicmud-daubersolitary-waspHymenopteraSphecidae

• Scenopinidae

  window flies

  Scenopinidae, commonly known as window flies, comprise approximately 400 described species of small brachyceran flies distributed worldwide. Adults are typically found on windows in buildings, giving rise to their common name. The family includes three subfamilies: Caenotinae, Proratinae, and Scenopininae. Larvae are predatory, inhabiting diverse environments from sandy arid soils to decaying organic matter, animal nests, and synanthropic settings. Two species, Scenopinus fenestralis and S. glabrifrons, have achieved cosmopolitan distributions through association with human trade.

  Dipterapredatory-larvaesynanthropicwindow-fliesarid-habitatcosmopolitan-speciesbiological-controlAsilomorpha

• Scenopinus fenestralis

  window fly, House Windowfly

  Scenopinus fenestralis, commonly known as the window fly, is a small predatory fly in the family Scenopinidae. Adults are frequently observed resting on windows of old buildings and outhouses, where their behavior appears relatively inactive. The species has been recorded across Europe, including Central Europe and Southern England. Its larvae are notable predators of clothes moth and flea larvae.

  predatorsynanthropicbiological-control

• Sciaridae

  dark-winged fungus gnats, black fungus gnats

  Sciaridae are a family of small, dark-colored flies commonly known as dark-winged fungus gnats. Adults range from 1–11 mm in length, typically under 5 mm. The family is among the least studied of the large Diptera families due to small size and taxonomic difficulty. Approximately 1,700 species are described globally, with an estimated 20,000 species awaiting discovery, primarily in tropical regions. Larvae develop in moist, decaying organic matter and play significant roles in decomposition and nutrient cycling.

  decomposerpestmushroom-pestgreenhouse-pestfungus-gnatsoil-dwellingprocessionary-behaviorpaternal-genome-eliminationsynanthropic

• Scotophaeus blackwalli

  Mouse Spider

  Scotophaeus blackwalli, commonly called the mouse spider, is a ground-dwelling spider in the family Gnaphosidae. It is native to Europe, the Caucasus, Turkey, and Iran, and has been introduced to North America, Peru, and Hawaii. The species is nocturnal and does not build webs for prey capture, instead hunting actively or scavenging opportunistically. It is frequently found in and around human dwellings, particularly in Britain during autumn.

  spiderground-spidersynanthropicnocturnalhunterEuropeintroduced-species

• Scutigera

  house centipede

  Scutigera is a genus of centipedes in the family Scutigeridae, commonly known as house centipedes. The genus comprises more than 30 species, with Scutigera coleoptrata being the most widespread and well-studied. Members of this genus are characterized by exceptionally long legs and antennae, true compound eyes, and remarkable speed. They are primarily synanthropic, having spread globally through human commerce from their presumed Mediterranean origin.

  centipedehouse-centipedesynanthropicbiological-controlcompound-eyesleg-regenerationcosmopolitan-distributionScutigeromorphaScutigeridaeScutigera-coleoptrata

• Scutigera coleoptrata

  House Centipede, Thousand-legger

  Scutigera coleoptrata, commonly known as the house centipede, is a fast-moving predatory centipede native to the Mediterranean region that has become cosmopolitan through human commerce. Adults possess 15 pairs of extremely long, delicate legs and well-developed faceted eyes—unusual traits among centipedes. They are synanthropic, thriving in human dwellings where they hunt household arthropods. Despite their alarming appearance and speed, they pose minimal threat to humans and are considered beneficial predators of pests.

  synanthropicpredatorbeneficialfast-movingnocturnalvenomous-to-preyharmless-to-humanscosmopolitaninvasivehousehold-pest-control

• Scutigeridae

  house centipedes, typical house centipedes

  Scutigeridae is a family of centipedes commonly known as house centipedes, characterized by their synanthropic habits and frequent association with human dwellings. The family includes well-known species such as Scutigera coleoptrata and Allothereua maculata, which have been anthropogenically introduced worldwide. Members of this family are fast-moving predators with elongated legs adapted for rapid locomotion. The family comprises approximately 25 genera, with fossil evidence dating to the Early Cretaceous.

  centipedehouse-centipedesynanthropicbeneficial-predatorfast-movingnocturnal

• Scythris sinensis

  Scythris sinensis is a small moth in the family Scythrididae, described by Felder & Rogenhofer in 1875. Native to eastern Asia, it has established populations across Europe and North America, often associated with human activity. The species is thermophilous and synanthropic, with larvae that mine the leaves of goosefoot plants. Adults are generally bivoltine, with a possible third partial generation in warmer southern regions.

  synanthropicurbanleaf-minerintroduced-speciesbivoltine

• Scytodes longipes

  Long-legged Spitting Spider

  Scytodes longipes is a tropical spitting spider distinguished by its long legs and specialized prey-capture behavior. Unlike short-legged Scytodes species that are ground-dwelling hunters, this species constructs tangled, sheet-like webs similar to cellar spiders (Pholcidae). It has been introduced well beyond its native range, establishing populations on Pacific Islands, in Africa, Southeast Asia, and Australia. The species is notable for its communal tendencies and unique spitting mechanism that immobilizes prey with adhesive venom.

  spitting-spiderintroduced-speciestropicalsynanthropicspecialized-predatorweb-building

• Scytodes thoracica

  Common Spitting Spider, Spitting Spider

  Scytodes thoracica is a small spitting spider renowned for its unique hunting method: projecting venomous, sticky silk threads to immobilize prey. The species possesses six eyes arranged in three pairs and distinctive silk glands in the cephalothorax connected to venom glands, enabling production of venomous silk. Native to the Mediterranean region, it has achieved cosmopolitan distribution through human-mediated dispersal and is frequently encountered in synanthropic habitats.

  spitting-spidervenomous-silksynanthropichaplogynenocturnal-predatorcosmopolitan

• Scytodes univittata

  spitting spider

  Scytodes univittata is a spitting spider in the family Scytodidae, distinguished by its specialized venom projection hunting mechanism. Native to Central Asia and the Indian subcontinent, the species has been introduced to multiple regions worldwide including the Americas, Mediterranean Europe, and Hawaii. It belongs to a family characterized by six eyes arranged in three pairs, enlarged venom glands, and the unique ability to immobilize prey by spitting a sticky, silk-laced venom mixture. Two subspecies are recognized: the nominate form and Scytodes u. unilineata endemic to Myanmar.

  spitting-spiderintroduced-speciessynanthropicvenom-projectionsix-eyes

• Sepsidae

  black scavenger flies, ensign flies

  Sepsidae is a family of small, slender flies in the order Diptera, commonly known as black scavenger flies or ensign flies. The family contains over 300 described species worldwide. Adults are typically found on mammal excrement, decaying animal and plant material, and carrion, where they feed and oviposit. Many species exhibit a distinctive wing-waving behavior while walking. The family plays a significant ecological role as decomposers and has forensic and hygienic relevance due to their association with feces and decaying matter.

  Dipteracoprophagousdecomposerforensic-entomologydung-flyant-mimicrywing-waving-behaviorsynanthropiclivestock-associatedglobal-distribution

• Shelfordella

  Turkestan cockroach, red runner cockroach, rusty red cockroach

  Shelfordella is a genus of cockroaches in the family Blattidae, with Shelfordella lateralis being the most widely documented species. The genus is native to regions from northern Africa through Central Asia. S. lateralis has become an established invasive species in North America since 1978, particularly in California and Texas, where it has displaced the oriental cockroach in many areas. The species is primarily outdoor-dwelling but occasionally enters structures through sewers and drains.

  invasive-speciessynanthropicurban-pestantibiotic-resistancedisplacementCaliforniaCentral-Asiapet-foodsewer-dwellingnocturnaloutdoor-cockroachmilitary-introduction1978-establishmentTurkestan-cockroachred-runner-cockroachrusty-red-cockroach

• Sicariidae

  Sixeyed Sicariid Spiders, recluse spiders, violin spiders, sand spiders, assassin spiders

  Sicariidae is a family of haplogyne spiders comprising three genera—Loxosceles, Sicarius, and Hexophthalma—with approximately 177-180 species. Members are characterized by six eyes arranged in three dyads (pairs), a distinctive trait among spiders. The family includes medically significant species such as the brown recluse (Loxosceles reclusa) and six-eyed sand spiders. All genera produce sphingomyelinase D or related tissue-destroying substances in their venom, unique among spiders. The family exhibits diverse ecological strategies: Loxosceles species are synanthropic and found nearly worldwide in warmer regions, while Sicarius and Hexophthalma are specialized desert dwellers with self-burying behavior.

  medically-significantvenomoushaplogynesix-eyeddesert-adaptedcave-dwellingsynanthropicnecrotic-venom

• Smeringopus pallidus

  Pale Daddy-Long-Leg, Pale Cellar Spider

  Smeringopus pallidus is a cosmopolitan cellar spider (family Pholcidae) known for its distinctive pale coloration and extremely long, slender legs. The species builds irregular, three-dimensional cobwebs in sheltered locations and exhibits specialized anti-predator defenses including rapid leg waving, leg autotomy with continued movement of detached legs as visual distraction, and thanatosis (death feigning). Originally described from Africa, it has been introduced to tropical and subtropical regions worldwide including South America, the Caribbean, Sri Lanka, Southeast Asia, Australia, and Pacific islands. The species reaches body lengths up to 7 mm with females larger than males, and is characterized by purple spots along the dorsal abdomen and a dark ventral sternal stripe.

  Pholcidaecellar-spiderdaddy-long-legcosmopolitansynanthropictropicalweb-buildinganti-predator-defenseleg-autotomywhirling-behaviorthanatosis

• Spirostreptidae

  Flatplate Millipedes

  Spirostreptidae is a family of large millipedes in the order Spirostreptida, commonly known as flatplate millipedes. The family comprises approximately 100 genera distributed across tropical and subtropical regions of the Americas, Africa, Madagascar, Seychelles, and the eastern Mediterranean. Members are characterized by their elongated cylindrical bodies and are primarily soil-dwelling detritivores, though some species exhibit arboreal habits. The family includes both synanthropic species that can become urban pests and species with specialized thermoregulatory and social behaviors.

  millipedediplopodsoil-faunadetritivoretropicaldesertthermoregulationaggregationsynanthropicgonopod-taxonomy

• Steatoda

  False Widow Spiders, Cupboard Spiders

  Steatoda is a genus of cobweb spiders in the family Theridiidae containing approximately 120 recognized species with worldwide distribution. Many species are synanthropic, commonly found in human dwellings, sheds, garages, and undisturbed corners. Members are frequently mistaken for widow spiders (Latrodectus) due to similar body shape and web structure, earning them the common name "false widows," though they are significantly less harmful to humans. The genus includes both native and invasive species, with Steatoda nobilis (Noble False Widow) being particularly notable for its rapid range expansion in Europe and North America.

  spiderscobweb-weaverssynanthropicfalse-widowsmedically-significant-venom-(minor)invasive-speciesTheridiidae

• Steatoda bipunctata

  Rabbit Hutch Spider

  Steatoda bipunctata is a small cobweb spider in the family Theridiidae, commonly known as the Rabbit Hutch Spider due to its frequent association with human structures. Native to Europe, it has been introduced to North America and is now established across the Atlantic provinces, northern New England, and southern Québec and Ontario. It closely resembles the native North American species Steatoda borealis and has been documented to competitively displace it in disturbed habitats. The species poses minimal medical risk to humans.

  cobweb-spidersynanthropicinvasivefalse-widowcompetitive-displacement

• Steatoda grossa

  Cupboard spider, Dark comb-footed spider, Brown house spider, False black widow

  Steatoda grossa is a cosmopolitan cobweb spider in the family Theridiidae, native to Europe and temperate Asia and introduced globally. It constructs irregular three-dimensional webs in dark, sheltered locations and is frequently mistaken for venomous black widows (Latrodectus spp.) due to its similar body shape and coloration, though it lacks the distinctive red hourglass marking. Bites to humans are rare and generally minor, causing localized pain and blistering with occasional systemic symptoms.

  spidercobweb-weaversynanthropiccosmopolitanmedically-significant-(minor)web-buildingpredator

• Steatoda nobilis

  Noble False Widow

  Steatoda nobilis is a large theridiid spider native to Madeira and the Canary Islands, now established as one of the world's most invasive spider species. It has spread across Europe, North and South America, and other temperate regions, often becoming the dominant spider in urban environments. The species is of moderate medical significance: bites typically cause symptoms similar to bee or wasp stings, though some cases involve more severe reactions including bacterial infections from pathogenic bacteria carried on the spider's body. It constructs strong, irregular cobwebs with concealed tubular retreats and employs an 'attack wrap' hunting strategy to subdue prey.

  invasive-speciesmedically-significantsynanthropicurban-ecologytheridiidvenomous

• Steatoda triangulosa

  Triangulate Cobweb Spider, Triangulate Combfoot, Triangulate Bud Spider

  Steatoda triangulosa is a small cobweb spider in the family Theridiidae, frequently encountered in human-made structures across North America and Europe. Adults measure 3.5–5.9 mm in body length, with females larger than males. The species is recognized by the distinctive triangular pattern on its abdomen. It is synanthropic, thriving in basements, garages, and cellars, and has been introduced to North America from the Palearctic region. The species is not considered dangerously venomous to humans.

  synanthropiccobweb-spiderhouse-spiderintroduced-speciesnon-venomousgeneralist-predator

• Supella

  brown-banded cockroaches

  Supella is a genus of small, synanthropic cockroaches in the family Ectobiidae, with the brown-banded cockroach (S. longipalpa) being the most widespread and well-known species. Native to Africa and the Arabian Peninsula, the genus has achieved cosmopolitan distribution through human-mediated transport. Members of this genus are distinguished by transverse pale bands across the wings and abdomen, pronounced sexual dimorphism in wing development, and a preference for warm, dry indoor environments. The type species S. longipalpa is a significant public health pest that completes its entire life cycle within human-built structures.

  cockroachpesturbansynanthropicsexual-dimorphismindoorpublic-healthcosmopolitan

• Supella longipalpa

  brown-banded cockroach, brownbanded cockroach, TV roach

  Supella longipalpa, commonly known as the brown-banded cockroach, is a small synanthropic pest of presumed African origin that has become established in human-built structures worldwide. It is notable for pronounced sexual dimorphism: males are slender with long, functional wings and are capable of flight, while females are broader with short, non-functional wings. The species completes its entire life cycle indoors and shows distinct behavioral preferences for warmer, drier locations compared to other domestic cockroaches, often inhabiting furniture, appliances, and upper wall areas.

  synanthropicurban-pestsexual-dimorphismindoor-habitatpublic-healthinvasiveWolbachiamicrobiomenocturnalthigmotaxisoviposition-behaviorcircadian-rhythmpheromone-communication

• Synthesiomyia nudiseta

  Synthesiomyia nudiseta is a large muscid fly (7–10 mm) and the sole species in its genus. It is necrophagous and facultatively predatory, with larvae known to consume other necrophagous fly larvae including Chrysomya rufifacies and C. albiceps. The species is forensically significant due to its predictable life cycle and tendency to pupate in confined locations near carcasses, such as within clothing. Originally tropical and subtropical in distribution, it has established in southwestern Europe (Spain, Italy, Portugal) and occurs in the southern United States.

  forensic-entomologynecrophagypredatory-larvaeinvasive-speciesphoresymyiasissynanthropic

• Syrphus ribesii

  Common Banded Hoverfly

  Syrphus ribesii is a common Holarctic hoverfly and an effective aphid predator in both agricultural and natural ecosystems. Adults are frequent flower visitors, feeding on nectar and pollen while providing pollination services. The species is highly migratory and shows remarkable adaptability to diverse habitats from farmland to forest. Two distinct chromosome races exist across much of Europe.

  hoverflyaphid-predatorpollinatorbiological-controlHolarcticmigratorysynanthropic

• Tachinaephagus

  A genus of gregarious larval–pupal parasitoids in the family Encyrtidae. Species in this genus, particularly T. zealandicus, are known to attack synanthropic Diptera including muscoid flies and calliphorid carrion flies. They have been studied for biological control applications and forensic entomology due to their predictable development on decomposing remains.

  parasitoidforensic-entomologybiological-controlsynanthropicDipteragregariousEncyrtidaecarrion-fliesmuscoid-fliesolfactory-response

• Tachinaephagus zealandicus

  Tachinaephagus zealandicus is a gregarious larval-pupal endoparasitoid wasp in the family Encyrtidae. It parasitizes larvae of synanthropic Diptera, particularly muscoid flies including Musca domestica and various Calliphoridae species associated with decomposing carrion. The species has been studied extensively for its potential in forensic entomology and biological control. Under laboratory conditions at 25°C, its life cycle completes in 23–27 days, with single hosts producing 3–18 adult parasitoids.

  parasitoidforensic-entomologybiological-controlsynanthropiccarrion-associatedgregariousHymenopteraEncyrtidaeDiptera-parasitoid

• Talitroides alluaudi

  Alluaudi's landhopper

  A terrestrial amphipod (landhopper) native to the Atlantic forests of southeastern Brazil, now distributed worldwide through synanthropic human-mediated dispersal. Found in leaf litter of tropical and subtropical forests, urban parks, greenhouses, and silviculture areas. Females dominate populations with a strongly female-biased sex ratio observed in field samples. Exhibits highly stereotyped grooming behavior for hygiene maintenance.

  terrestrial-amphipodlandhoppersynanthropicdetritivoreAtlantic-forestgrooming-behaviorfemale-biased-sex-ratioinvasivegreenhouse-pestsoil-fauna

• Tapinesthis

  Ivy parchment spider

  Tapinesthis is a monotypic genus of goblin spiders (family Oonopidae) containing only Tapinesthis inermis, commonly known as the ivy parchment spider. The genus is characterized by its spineless legs, steeply sloping carapace with a dark net-like pattern, and soft body structure. Originally native to Europe, the species has been introduced to North America and shows synanthropic tendencies, frequently inhabiting human dwellings alongside natural habitats. The genus name reflects its distinctive morphological features within the diverse goblin spider family.

  goblin-spidersynanthropicmonotypic-genusspinelessintroduced-speciesEuropeNorth-America

• Tasgius

  large rove beetles

  Tasgius is a genus of large rove beetles in the family Staphylinidae, containing at least 20 described species. Members of this genus are notable for their relatively large size compared to most rove beetles. At least one species, T. winkleri, has been introduced to North America from Europe and has established populations across multiple U.S. states and Canadian provinces. The genus is characterized by morphological features including dilated front tarsi in males.

  rove-beetlesStaphylinidaeintroduced-speciessynanthropicColeoptera

• Tasgius ater

  Large rove beetle

  Tasgius ater is a large rove beetle in the family Staphylinidae, native to Europe and now introduced to North America, Australia, and New Zealand. It is among the larger species in this diverse beetle family and exhibits typical rove beetle morphology with shortened elytra exposing most of the abdomen. The species has expanded its range significantly in North America since first detected in the 1930s.

  rove-beetleStaphylinidaeintroduced-speciessynanthropicEuropeNorth-Americainvasive

• Tasgius winkleri

  Tasgius winkleri is a rove beetle (family Staphylinidae) native to Europe that has become established in North America. First reported in New York in 1938, it has since spread to both coasts and westward to Illinois and Colorado. This synanthropic species thrives in human-disturbed habitats and is seldom found far from human activity. Males can be distinguished by their dilated front tarsi (expanded 'feet'). The species was previously confused with T. melanarius under the name Tasgius globulifer until taxonomic revision in 1987.

  rove-beetleintroduced-speciessynanthropicEuropeNorth-AmericaStaphylinidae

• Tegenaria domestica

  Barn Funnel Weaver, Domestic House Spider

  Tegenaria domestica is a funnel-web spider in the family Agelenidae, native to Europe but now distributed nearly worldwide through human introduction. It is one of the smaller species in its genus, with females averaging 7.5–11.5 mm and males 6–9 mm in body length. The species is notable for building characteristic funnel-shaped webs and for recently documented colonial behavior in a unique cave environment in Greece/Albania, where thousands of individuals cooperatively maintained a communal web exceeding 100 square meters.

  spiderfunnel-websynanthropiccave-dwellingcolonial-behaviorchemoautotrophic-ecosystem

• Tegenaria pagana

  Rural Funnel-web Spider, House Funnel-web Spider

  Tegenaria pagana is a small funnel-web spider in the family Agelenidae, first described from Greece in 1840. It is a synanthropic species strongly associated with human habitations, earning it the common name 'house funnel-web spider.' The species is native to the Palearctic region from Europe through North Africa to Central Asia, but has been introduced globally and is now established on multiple continents. A 2013 taxonomic revision substantially reduced its synonymy, consolidating several previously recognized species. It has been studied as a comparative model for eye development and troglomorphic evolution in cave-dwelling spiders.

  spiderfunnel-web-weaversynanthropiccosmopolitantroglophiledevelopmental-model

• Tenebroides mauritanicus

  cadelle, cadelle beetle

  Tenebroides mauritanicus, the cadelle, is a cosmopolitan stored-product pest beetle in the family Trogossitidae. Adults are exclusively carnivorous, feeding on other insects including flour beetles and false powderpost beetles, while larvae consume grain products and transition to predatory behavior as they develop. The species is notable for its longevity, with adults surviving over 50 days and larvae over 120 days without food. It is the only member of Trogossitidae known to infest stored grain, causing significant damage through both direct feeding and by gnawing holes in packaging that expose food to other pests.

  stored-product-pestgrain-pestcosmopolitanpredatory-beetlesynanthropic

• Thereuonema

  Thereuonema is a genus of scutigeromorph centipedes in the family Scutigeridae. The genus contains at least one well-documented species, Thereuonema tuberculata, which is native to Asia and has been introduced to Europe and North America. Members of this genus are associated with human-modified environments and have established populations outside their native range.

  centipedescutigeromorphsynanthropicinvasiveAsiaintroduced-species

• Theridiidae

  tangle-web spiders, cobweb spiders, comb-footed spiders

  Theridiidae is a large, globally distributed family of araneomorph spiders comprising over 2,600 species in more than 130 genera. Members are characterized by a comb of serrated bristles (setae) on the tarsus of the fourth leg, used to manipulate silk. The family exhibits remarkable diversity in web architecture, ranging from irregular tangle webs to specialized gumfoot webs and sheet-like structures. Theridiids are ecribellate, producing sticky capture silk rather than woolly silk, and are entelegyne with females possessing a genital plate. The family includes medically significant species such as widow spiders (Latrodectus), model organisms for social behavior research (Anelosimus), and specialized kleptoparasites (Argyrodinae).

  AraneaeAraneomorphaeecribellateentelegynesynanthropickleptoparasiticsocial-spidersmedically-significantmodel-organisminvasive-speciescave-adaptedant-specialist

• Thermobia

  Thermobia is a genus of primitive insects in the family Lepismatidae, order Zygentoma. The genus name derives from Greek roots meaning 'warmth' and 'life,' reflecting its members' thermophilic nature. The best-known species, Thermobia domestica (firebrat), is a common synanthropic pest of heated indoor environments worldwide. The genus was originally described as Termophila by Grassi in 1887, emended to Thermophila in 1889, and renamed to Thermobia by Bergroth in 1890.

  ZygentomaLepismatidaeThermobiafirebratsilverfishthermophilicsynanthropichousehold-pestheated-buildingsindoor-pest

• Tinea

  Tinea is a genus of fungus moths in the family Tineidae, established as one of the earliest subgroups of moths. It is the type genus of both its family and subfamily. Historically, the genus encompassed many species now placed in other genera. Species within Tinea include economically significant pests such as the casemaking clothes moth (Tinea pellionella).

  keratinophagoussynanthropicpestclothes-mothcase-bearingtextile-peststored-product-pestcosmopolitan

• Tinea pellionella

  case-bearing clothes moth, casemaking clothes moth, fur moth

  Tinea pellionella is a small tineid moth commonly known as the case-bearing or casemaking clothes moth. It is a cosmopolitan pest of stored woollen goods and natural keratinous materials. The species is distinguished by larval behavior: caterpillars construct portable silken cases reinforced with debris and food fibers, which they carry while feeding. Adults are weak fliers with reduced mouthparts and do not feed. The species has become less common in modern centrally heated homes due to drier conditions.

  peststored-productkeratinophagesynanthropiccase-bearing-larva

• Tinea unidentified-az

  Tinea unidentified-az is a member of the fungus moth family Tineidae, a lineage that predates many more recognizable moth species. The genus Tinea includes several species with specialized larval habits, most notably the casemaking clothes moth (Tinea pellionella), whose larvae construct portable silk tubes incorporating food debris and frass. Tineid moths as a group are characterized by their ability to exploit keratinaceous materials and other organic substrates. This particular taxon designation suggests an unidentified or undescribed species from Arizona, though specific details remain undocumented.

  Tineidaeclothes-mothkeratinophagesynanthropicundescribedArizona

• Tineola

  clothes moths

  Tineola is a genus of small moths in the family Tineidae containing two described species, including the economically significant common clothes moth (T. bisselliella). The genus is notable for larvae that possess specialized digestive capabilities enabling them to metabolize keratin, a protein found in hair, wool, feathers, and other animal-derived materials. These moths are synanthropic, having evolved alongside humans and now rarely occurring outside human dwellings.

  synanthropickeratinophagestored-product-pesttextile-pest

• Tineola bisselliella

  webbing clothes moth, common clothes moth, clothing moth

  Tineola bisselliella is a small moth in the family Tineidae, notable as a significant pest of stored wool and natural fibers. Adults are 6–7 mm in body length with a 9–16 mm wingspan, characterized by pale yellowish-ochreous forewings and a distinctive red-orange tuft of hair on the head. The species is synanthropic, now rarely found outside human dwellings. Larvae possess the unusual ability to digest keratin, enabling them to feed on wool, silk, fur, and other animal-derived materials. Adults do not feed and have atrophied mouthparts; all damage is caused by larval feeding.

  pestsynanthropickeratinophagousstored-product-pestclothes-mothurban-pestmuseum-pest

• Triatoma sanguisuga

  Eastern Bloodsucking Conenose, Mexican Bed Bug, Kissing Bug

  Triatoma sanguisuga is a blood-feeding assassin bug in the subfamily Triatominae, commonly known as the eastern bloodsucking conenose or kissing bug. It is the most widespread triatomine species in the United States and serves as a vector for Trypanosoma cruzi, the parasite that causes Chagas disease. Unlike highly efficient South American vectors such as Triatoma infestans, T. sanguisuga typically defecates after feeding rather than during, reducing but not eliminating transmission risk to humans. The species has been implicated in documented autochthonous human Chagas disease cases in the United States.

  vectorChagas-diseaseTrypanosoma-cruziblood-feedingTriatominaepublic-healthkissing-bugassassin-bugzoonosissynanthropic

• Trogium pulsatorium

  larger pale booklouse, deathwatch, common booklouse, grain psocid

  Trogium pulsatorium is a granary booklouse in the family Trogiidae with a near-cosmopolitan distribution spanning six continents. It inhabits stored grain facilities, warehouses, and human dwellings where it feeds on dry organic matter. The species is notable for its association with stored products and its historical confusion with true deathwatch beetles due to shared common names.

  stored-product-pestcosmopolitangranarypsocidsynanthropic

• Urozelotes rusticus

  Urozelotes rusticus is a cosmopolitan ground-dwelling spider in the family Gnaphosidae and the type species of the genus Urozelotes. Originally described from Europe in 1872, it has been introduced to the Americas, tropical Africa, Australia, and South Africa through human activity. Its synanthropic habits enable it to thrive in buildings and modified environments worldwide.

  spiderarachnidground-spidersynanthropiccosmopolitanintroduced-speciestype-species

• Zoropsis spinimana

  Mediterranean Spiny False Wolf Spider, Nosferatu-Spinne

  Zoropsis spinimana is a medium-sized zoropsid spider native to the Mediterranean region that has expanded its range northward into Central and Northern Europe and been introduced to the United States and United Kingdom. The species is notable for its wolf spider-like appearance but with eyes more spread out along the cephalothorax, and for its strong association with human dwellings where it finds mild temperatures and abundant prey. It is an active nocturnal hunter that does not build webs. Sexual maturity occurs in autumn, with egg-laying in spring. Climate change and human-mediated transport have facilitated its range expansion.

  spiderAraneaeZoropsidaesynanthropicrange-expansionintroduced-speciesnocturnal-hunternon-web-building

• Zygiella

  Missing-sector Orbweb Spiders

  Zygiella is a genus of orb-weaver spiders distinguished by their distinctive webs, which feature a missing sector containing a single signaling thread that leads to a tubular retreat. First described by F. O. Pickard-Cambridge in 1902, the genus underwent taxonomic revision in 2015 when Parazygiella was synonymized with Zygiella. The genus has a global distribution, with species found across Europe, North America, Asia, and introduced populations in South America and elsewhere.

  orb-weavermissing-sector-websynanthropicglobal-distributionsignal-threadaggregative-behaviorweb-plasticityharmless-to-humansintroduced-specieswinter-active

• Zygiella x-notata

  missing sector orb weaver, silver-sided sector spider, Winter Spider, Opensector Orbweaver

  Zygiella x-notata is an orb-weaving spider distinguished by its characteristic web with a missing sector in the upper half, connected by a signal thread to a peripheral retreat. Adult females measure 5–11 mm, males up to 7 mm. The species exhibits strong synanthropic behavior, commonly found on human structures such as window frames, walls, and fences. It has an annual life cycle with reproduction in summer and egg sac production in autumn. Native to Europe, it has been introduced to North America, New Zealand, and other regions worldwide.

  orb-weaversynanthropicurbanintroduced-speciesweb-building-plasticityvibrational-communication