Non-aggressive

Guides

Argiope
Garden Orbweavers, St Andrew's Cross Spiders, Writing Spiders, Garden Spiders
Argiope is a genus of large, colorful orb-weaving spiders in the family Araneidae. The name derives from Greek, meaning 'silver-faced,' referring to the silvery cephalothorax characteristic of many species. Females are notably larger than males and often display striking abdominal color patterns in yellow, black, and silver. These spiders construct spiral orb webs that frequently include a conspicuous zigzag silk structure called a stabilimentum. The genus has a worldwide distribution, with species found across tropical and temperate regions on every continent except Antarctica.
orb-weaver stabilimentum sexual-dimorphism garden-spider beneficial-predator cosmopolitan aposematic-coloration thermoregulation web-architecture non-aggressive
Auplopus
spider wasps
Auplopus is a large genus of small spider wasps in the family Pompilidae, distributed worldwide except Antarctica. Females construct distinctive barrel-shaped mud nests, often inside pre-existing cavities such as abandoned nests of other wasps, hollows in wood, or rock crevices. They hunt spiders, paralyze them with venom, and amputate the legs before transporting the prey to their nests. The wasps provision each mud cell with one or more paralyzed spiders, lay a single egg on the final victim, and seal the cell. Auplopus species are solitary and non-aggressive, with most activity occurring from May to October.
spider-wasp mud-nest solitary-wasp spider-predator Pompilidae Pepsinae Auplopini metallic-wasp non-aggressive beneficial-insect
Auplopus architectus
Auplopus architectus is a small to medium-sized spider wasp in the family Pompilidae. Females construct distinctive barrel-shaped mud nests, often inside pre-existing cavities such as rock crevices, wood holes, or abandoned nests of other wasps. The species hunts spiders, amputates their legs to facilitate transport, and provisions each mud cell with multiple paralyzed victims before laying a single egg. Populations occur in disjunct regions of North America including California, the northeastern United States, and Arkansas.
mud-nesting spider-hunting solitary-wasp non-aggressive
Auplopus mellipes variitarsus
Auplopus mellipes variitarsus is a subspecies of small spider wasp in the family Pompilidae, tribe Auplopini. Females construct distinctive free-standing mud cells, typically barrel-shaped and approximately 15 millimeters long, to house paralyzed spider prey and a single offspring. The species exhibits bright metallic blue-green coloration, with females bearing a diagnostic pygidial plate on the abdomen used as a masonry trowel during nest construction. Like other Auplopus, this subspecies is solitary and non-aggressive, feeding on aphid honeydew as adults while provisioning nests with spiders from diverse families.
spider-wasp mud-nest solitary-wasp metallic-blue-green pygidial-plate aphid-honeydew spider-predator non-aggressive
Chalybion californicum
Common Blue Mud-dauber Wasp, Blue Mud Dauber
Chalybion californicum is a solitary mud-dauber wasp with metallic blue coloration, widely distributed across North America. Females are renowned as predators of black widow spiders and other web-building spiders, using specialized hunting tactics including web vibration to lure prey. Unlike most mud-daubers, this species does not construct nests from scratch but instead renovates abandoned mud nests, particularly those of Sceliphron caementarium. The species is not aggressive toward humans and has been introduced to several regions outside its native range.
solitary-wasp mud-dauber spider-predator black-widow-predator metallic-blue nest-renovator non-aggressive pollinator
Chalybion zimmermanni
Zimmerman's Mud-dauber Wasp, Zimmermann's Mud Wasp
Chalybion zimmermanni is a solitary thread-waisted wasp in the family Sphecidae. It is one of two Chalybion species found north of Mexico, distinguished from the widespread C. californicum by its more restricted southeastern and southwestern U.S. distribution, white thoracic hairs, and smoky rather than violaceous wing coloration. Like its congener, it is a spider-hunting wasp that repurposes existing mud nests rather than constructing its own.
solitary-wasp mud-dauber spider-predator nest-parasite non-aggressive building-nester southeastern-US southwestern-US
Chalybion zimmermanni aztecum
Aztec Mud-dauber Wasp
Chalybion zimmermanni aztecum is a subspecies of mud dauber wasp in the family Sphecidae, commonly known as the Aztec Mud-dauber Wasp. It is one of two Chalybion species found north of Mexico, distinguished from the widespread C. californicum by white thoracic hairs and smoky rather than violaceous wing coloration. Like other blue mud daubers, females are solitary nesters that remodel abandoned mud nests rather than constructing new ones from scratch, and hunt spiders including black widows to provision their offspring.
mud-dauber solitary-wasp spider-predator black-widow-predator nest-parasite non-aggressive
Chalybion zimmermanni zimmermanni
Zimmerman's Mud-dauber Wasp
Chalybion zimmermanni zimmermanni is a subspecies of mud dauber wasp in the family Sphecidae. It is one of two Chalybion species found north of Mexico, distinguished from the widespread C. californicum by its white thoracic hairs and smoky rather than violaceous wing coloration. Like other blue mud daubers, females are solitary nesters that remodel abandoned mud nests rather than constructing their own, and hunt spiders including black widows as prey for their larvae.
mud-dauber solitary-wasp spider-hunter black-widow-predator non-aggressive nest-parasite
Colletes aestivalis
Alumroot Cellophane Bee, Summer Cellophane Bee
Colletes aestivalis is a solitary ground-nesting bee in the family Colletidae, commonly known as the Alumroot Cellophane Bee. It is one of approximately 99 Colletes species in North America. Like other members of its genus, females construct individual burrows in sandy soils and line brood cells with a distinctive cellophane-like secretion from the Dufour's gland. The specific epithet 'aestivalis' (Latin for 'of summer') reflects its summer flight period, distinguishing it from many congeners that are active in spring or fall.
solitary-bee ground-nesting pollinator cellophane-bee polyester-bee plasterer-bee summer-active native-bee non-aggressive
Colletes hyalinus
polyester bee, plasterer bee, cellophane bee
Colletes hyalinus is a solitary ground-nesting bee in the family Colletidae, native to North America. The species belongs to a group commonly known as polyester bees or plasterer bees, named for the distinctive cellophane-like lining females create in their underground brood cells using secretions from the Dufour's gland. Three subspecies are recognized: C. h. hyalinus, C. h. gaudialis, and C. h. oregonensis. Like other members of the genus, this species exhibits protandry, with males emerging before females.
solitary-bee ground-nesting pollinator native-bee Colletidae spring-bee autumn-bee non-aggressive aggregation-nesting protandry
Eumenes americanus
American Potter Wasp
Eumenes americanus is a solitary potter wasp in the family Vespidae, known for constructing distinctive urn-shaped mud nests. Females build complete mud containers about the size of a marble, often with a fluted neck, before provisioning them with paralyzed caterpillars as food for a single larva. The species is non-aggressive and poses minimal sting risk to humans.
solitary-wasp mud-nest potter-wasp caterpillar-predator non-aggressive
Isodontia auripes
Brown-legged Grass-carrier Wasp, brown-legged grass-carrier
Isodontia auripes, the brown-legged grass-carrier wasp, is a solitary thread-waisted wasp in the family Sphecidae. The species is known for its distinctive nesting behavior: females construct nests in pre-existing cavities such as window tracks, wind chimes, or abandoned carpenter bee tunnels, filling them with dry grass and provisioning them with paralyzed tree crickets (Oecanthus spp.) as food for their larvae. The wasp is non-aggressive toward humans and has been observed using nests made by Xylocopa virginica or mining bees. Larvae feed for approximately three days before pupating for two days.
solitary-wasp grass-carrying-wasp thread-waisted-wasp cavity-nester non-aggressive urban-adapter tree-cricket-predator Sphecidae Hymenoptera
Megachile rotundata
Alfalfa Leafcutter Bee, Alfalfa Leaf-Cutter Bee, Leafcutter Bee
Megachile rotundata is a solitary leafcutting bee native to Europe and the Mediterranean region, now widely established as a managed pollinator across North America and other continents. It is the second most important commercial pollinator globally after the honey bee, specifically renowned for its efficiency in alfalfa pollination. Females construct individual nests in pre-existing cavities, lining cells with precisely cut circular leaf pieces. The species is non-aggressive, does not produce honey, and has been introduced deliberately and accidentally to multiple regions for agricultural pollination services.
pollinator solitary-bee leafcutter-bee agricultural managed-species alfalfa non-aggressive cavity-nester introduced-species commercial-pollinator
Neoscona arabesca
Arabesque Orbweaver
Neoscona arabesca is a common orb-weaving spider found throughout North America, recognized by the distinctive swirling, brightly colored markings on its abdomen that give it the common name 'arabesque orbweaver.' Females build vertical orb webs 15–45 cm in diameter with 18–20 radii, occupying the hub at night and retreating to a curled leaf during the day. The species has been introduced to Nepal and China. It is a documented host for the parasitic ichneumon wasp Acrotaphus wiltii.
orb-weaver agricultural-predator non-aggressive common-species introduced-range
Parancistrocerus bicornis
Parancistrocerus bicornis is a small mason wasp in the subfamily Eumeninae, described by Roberts in 1901. Like other members of the genus, it is a solitary, cavity-nesting wasp that provisions its nests with paralyzed caterpillars as food for its larvae. The species is part of a taxonomically challenging group where live specimens and even microscope examination often cannot reliably distinguish between closely related species such as Parancistrocerus and Stenodynerus.
Vespidae Eumeninae mason-wasp solitary-wasp cavity-nester caterpillar-predator bee-block hollow-twig-nester sand-partition non-aggressive pollinator garden-beneficial taxonomically-challenging Roberts-1901
Scolia dubia dubia
Blue-winged Wasp, Two-spotted Scoliid Wasp, Blue-winged Digger Wasp
Scolia dubia dubia is a subspecies of scoliid wasp commonly known as the Blue-winged Wasp. Adults measure 20–25 mm in length and are distinguished by a bi-colored abdomen: black on the upper half and reddish-brown on the lower half, with two bright yellow spots in the red portion. The wings exhibit brilliant blue iridescent highlights visible in direct sunlight. Females are solitary parasitoids of scarab beetle grubs, including Cotinis nitida (Green June Beetle) and Popillia japonica (Japanese Beetle). Males are non-stinging and can be distinguished by longer antennae, more slender bodies, and a three-pronged pseudostinger.
parasitoid solitary beneficial scarab-control pollinator late-summer ground-nesting non-aggressive
Trichonephila clavata
Jorō spider, Joro Spider, Parachute spider
Trichonephila clavata, commonly known as the Jorō spider, is a large orb-weaving spider native to East Asia that has become established as an invasive species in the southeastern United States since approximately 2010. First confirmed in Georgia in 2014, it has expanded rapidly across multiple states through a combination of ballooning dispersal and human-mediated transport. The species is notable for its substantial size, striking coloration, and extensive golden webs, but poses minimal risk to humans due to small fangs and docile behavior. Its physiological adaptations—including higher metabolic rate, faster heart rate, and greater cold tolerance than its congener Trichonephila clavipes—suggest potential for continued northward range expansion.
invasive-species orb-weaver ballooning urban-wildlife biological-control cold-tolerance startle-response cannibalism kleptoparasitism Japanese-folklore Nephilidae Trichonephila spider-silk range-expansion physiological-adaptation urban-ecology agricultural-pest-predator iNaturalist Georgia Maryland East-Asia United-States spider-bite venom docile non-aggressive web-architecture egg-sac overwintering sexual-dimorphism metabolic-rate heart-rate freeze-tolerance road-ecology prey-capture competition native-spider-impacts public-perception media-sensationalism management pesticide-alternatives broom-removal ornamental structural-pest ornithology cardinal web-strength trophic-interactions DNA-metabarcoding diet-analysis species-distribution-model physiological-entomology behavioral-ecology arachnology ballooning-dispersal human-mediated-dispersal hitchhiker cargo-stowaway port-of-entry climate-change warming northward-expansion DMV Howard-County Elkridge Ilchester West-Elkridge beech-forest secondary-forest suburban roadside telephone-pole streetlamp forest-edge disturbance-tolerance prey-detection vibrational-noise auditory-disturbance motionless freezing shyness Hannibal-Lecter stink-bug lanternfly evolutionary-history ancient-association ecosystem-service biocontrol natural-enemy invasive-pest brown-marmorated-stink-bug spotted-lanternfly Halyomorpha-halys Lycorma-delicatula competitive-exclusion dominant-orb-weaver abundant population-growth rapid-spread range-span 120,000-km2 physiological-plasticity metabolism twice-as-high 77%-higher-heart-rate 74%-freeze-survival development-rate seasonal-window life-cycle-completion thermal-limitation congener-comparison natural-dispersal human-transport iNaturalist-record citizen-science confirmed-sighting breeding-population male-and-female gravid-female egg-case stowaway cargo-container port-introduction local-port vehicle-transport hitchhiking accelerated-arrival several-years natural-means prognostication prediction model suitable-habitat abundant-suitable-habitat eastern-North-America western-North-America potential-range invasive-range potential-impact environmental-impact ecological-impact ecosystem-impact monitor cautious evidence-based reasonable-journalism sensationalism exaggeration uncritical-acceptance harmless carefully-monitored next-steps research-opportunity call-for-research knowledge-gap little-known novel-ecosystem spreading rapidly-expanding invasive-predator invasive-orb-weaver non-native introduced established colonized thriving doing-fine happy merely-20-minutes-away road-trip visit access-spread beech-leaf-disease BLD state-forest remarkable-colony amongst-beech-trees confirmed-prognostication Davis-and-Frick escape-relative-warmth expand-range-northward eastern-seaboard merely-20-minutes-away-from-home resist-opportunity amazing-predators tales-of-arrival previous-episodes 2022 2024 reduce-angst large-non-native-spider establishing-in-DMV facts-presented past-episode venomous-terrible-painful Nah expert-Rick-Hoebeke risks-small puny-fangs unlikely-pierce-skin video completely-non-aggressive eastern-Howard-County haphazard-webs littered-with-remains former-victims leaves shed-exoskeletons much-larger-female dwarfs-mate positioned-just-above strand-of-silk spinnerets underside-of-abdomen near-red-mound relative-to-hand large-and-docile wait-and-see what-Jorō-means-to-ecosystems help-other-spiders put-a-beat-down-on-invasive-pests stink-bugs spotted-lanternflies passive-hunters enormous-webs larger-than-a-meter-in-diameter capture-prey-snared-in-silk arachnophobes-scary arachnophiles-beautiful important-ecosystem-services crop-pests native-range Asia having-an-old-friend-over-for-dinner reunite first-time large-spiders juicy-prey-items feathered-and-non-feathered-reptiles poses-no-known-threat difficult-to-predict-impact non-native-species experts-suggest beyond-scary-mien give-indigenous-large-orb-weavers-run-for-their-money black-and-yellow-garden-spider marbled-orb-weaver spotted-orb-weaver other-parts-of-world most-abundant-and-dominant-orb-weaver what-will-it-mean only-time-will-tell final-tidbit Jorō-shapeshifter Jorō-gumo beautiful-woman seduces-men binds-with-silk devours bad-date acknowledgements Rick-Hoebeke identifying-Jorō insights David-Coyle Bob-Bellinger great-images knowledge studies Veni-vidi-vici Nelsen-et-al.Physiological-evaluation Nephila-clavata-newly-recorded Hoebeke-et-al.Life-Cycle-Habitat-and-Variation Moore Startle-responses Davis-and-Anerao How-Urban-Tolerant-Are-They Davis-et-al.inspiration details stars Dave-Clement Miri-Talabac Maddie-Potter hooked-up-with-colony differentiate resources.ipmcenters.org link Jorō-guru David-Coyle's-take YouTube calm-your-fears Journal-of-Economic-Entomology Journal-of-Medical-Entomology chemical-management-strategies effective-management-methods spider-control-products safe-and-effective unlikely-to-bite generally-harmless big-spiders colorful-spiders invasive-spiders in-your-face-spiders webs-on-homes landscape-plants structures middle-of-where-people-live-work-and-play northern-Georgia-2014 presumed-arrived-few-years-prior 15-years increased-dramatically much-of-Southeast disjunct-populations northeastern-U.S.firestorm-of-interest rapidly-expanding-range southeastern-states many-counties Carolinas Tennessee Oklahoma more-than-a-century parts-of-Florida rarely-Pennsylvania tropics thermal-limitations higher-metabolism faster-heart-rate better-ability-to-tolerate-freezing complete-life-cycle-rapidly chilly-temperatures suite-of-adaptations expand-northward warm-loving-cousin findings-support-potential much-yet-to-be-learned successfully-survive-northern-winters nation-and-world-warm southern-species-expand higher-latitudes-and-altitudes rapidly-range-expansion-will-occur typical-mode-of-dispersal aerial-dispersal ballooning-on-strands-of-silk Charlotte's-babies Charlotte's-Web spectacular-moniker parachute-spider rain-down-from-airplanes long-distance-transit human-assistance good-hitchhikers inseminated-gravid-female egg-case-stowaway arrival-in-DMV several-years-by-natural-means new-introduction-at-local-port human-assist-in-vehicles accelerate-arrival terrible-and-painful small-fangs visited-cousin golden-silk-spider Costa-Rica exceeding-meter-diameter indigenous-large-orb-weavers run-for-their-money minimal-direct-impact firestorm Andrew-Davis Benjamin-Frick University-of-Georgia past-week native-to-eastern-Asia Japan China Korea Taiwan known-in-Georgia-since-2013 spreading-rapidly joined-its-cousin Trichonephila-clavipes established-over-160-years better-tolerate-freezing survive-northern-winters rapidly-range-expansion typical-mode long-distance new-introduction human-assist arachnophobes arachnophiles brown-marmorated-stink-bugs difficult-to-predict scary-mien indigenous-orb-weavers Mary-Nouri Sarah-Morgan WAMU relatively-harmless spider-season fall leaves-changing-color cool-crisp-autumn-air pumpkin-spice extension-entomologist Southeast not-just-spiders 20-feet-wide homes people-live-work-and-play 15-years-or-so influx-of-calls public entomology-extension-programs media-frenzy two-questions get-rid-of-Jorō-spiders are-Jorō-spiders-dangerous Clemson-University Southern-Adventist-University Washington-College Union-College two-new-studies test-methods-for-eliminating how-likely-to-bite harm scoured-internet recommended-treatment-options spider-specific-management-recommendations medically-relevant widow-spiders brown-recluses do-not-enter-homes relatively-new recommended-products labelled-spider-control-products tested-products several-products-eliminate not-legal-pesticides machine-lubricant not-recommended commercially-available strongly-encourage labelled-products easiest-and-cheapest without-chemicals broom-or-stick walked-into-spider-web rode-bike took-spider-to-face not-great-feeling wonder-if-bitey give-bitten-superpowers unique-studies evaluated-behaviors react-to-people rather-drop-off-web hang-around-and-bite really-provoke volunteered-to-get-bitten yes-you-read-correctly akin-to-mosquito-bite little-redness little-swelling largely-gone-next-day no-acquired-superpowers take-home-message twofold simplest-and-most-effective without-pesticides feel-you-need-pesticides product-labeled-for-spider-control try-not-to-freak-out doesn't-want-to-be-on-you odds-of-getting-bitten-extremely-low enjoy-glorious-fall-weather drink-pumpkin-spiced-beverage watch-where-you-walk Keep-calm-and-carry-on bites-unlikely cause-minimal-discomfort associate-professor Department-of-Forestry-and-Environmental-Conservation socials email extension featured pest-management Entomology-Today latest-posts email-subscription March-2022 wondered make-its-way-to-DMV September-2022 two-observations three-years 40-sightings happy-and-doing-just-fine several-Howard-County-locations week-or-so-ago team-of-scientists University mission killing-ultra-valuable-beech-trees thriving-amongst-beech-trees visit-amazing-predators mature-females both-Trichonephila-species three-locally-common-orb-weaving-species time-spent-immobile mild-disturbance brief-puff-of-air air-puff-response-data five-other-North-American-species published-literature 453-observations freezing-behavior 10-spider-species remained-immobile-under-a-minute both-Trichonephila-spiders over-an-hour unprecedented shyest-ever-documented tolerate-urban-environments remaining-motionless fleeing nonsexual-cannibalism mating-activity females-cannibalize-males food-availability territorial-aggression Southeastern-United-States expanding-range shy behavioral-reactions descriptive-observations photo-documentation anecdotal-observations controlled-pairings lab natural-webs field one-female-biting-and-killing-another short-fight similar-size container 25-trials fights-ensued-40%different-sizes 27-trials fights-happened-18%larger-females-not-always-aggressor 52-lab-trials six-bouts 9%direct-killing field-trials empty-web 14-trials one-fight 7%aggressor-killing-and-wrapping silk away-from-any-web not-necessarily-territoriality intraspecific-aggression provoked-or-stressed deserves-more-study newly-invasive biology physiology new-range closely-related-species successfully-established 160-years investigation compare online-records iNaturalist.org seasonal-distributions timing females physiological-traits environmental-tolerance metabolic-rates cardiac-functioning cold-exposure survival brief-below-freezing-temperature shorter-season complete-lifecycle narrow-period suitable-weather inherently-higher-metabolism low-temperature survive-better 74%-compared-to-50%brief-freeze colder-climatic-region southeastern-USA useful-information planning urban-landscapes busy-roads frequent-disturbances auditory-and-vibrational physiological-or-behavioral-changes northeast-Georgia varying-levels-of-road-traffic prey-capture-behavior simulated-prey tuning-fork 128-hz-frequency touched-to-web attacked 357-total-trials 20-different-roads attacked-59%high-variability some-roadsides-over-80%others-less-than-30%small-but-significant-negative-correlation daily-road-traffic spider-attack-rates moderate--to-heavy-traffic-roads slightly-less-likely-to-attack 51%-vs-65%able-to-live-near-roads cost-in-terms-of-prey-capture did-not-weigh-less compensate-for-disturbance accumulating-evidence human-dominated-landscapes aid-spread introduced-range Eriostethus-rufus polysphinctine-ectoparasitoid araneid-spiders Neoscona-spp.endemic-to-Japan Yamagata-Prefecture 38º46'-N northern-Japan northernmost-record genus identification-confirmed morphology DNA-barcoding cocoon large-modified-web unique inverted-triangle over-50-cm hanging-from-ill-defined-part no-organized-structure host-spider circumstantial-evidences structure-of-modified-web pre-existing-web-partly-reused orb-web-completely-removed sustaining-threads-newly-moored parasitises-host-spiders two-subfamilies unusual-for-group invasion-potential known-invasive-range review dispersal-abilities potential-impacts management-strategies October-2022 at-least-120,000-km2 South-Carolina North-Carolina Alabama West-Virginia pattern-of-spread natural-dispersal-mechanisms human-mediated-transport large-bodied-orb-weavers flying-insects small-animals thirteen-co-occurring-spider-species monitored-for-competition resources web-building-sites natural-and-urban-habitats management-options-limited advise-journalists-and-experts against-exaggerating-potential-environmental-impact ecologically-harmless rapid-spread-carefully-monitored cautious-evidence-based-approach determining-next-steps three-material-types web-capture introduced-species alter-established-trophic-interactions molecular-analysis resolve-changes community-structure foraging-links east-coast fecal-samples prey-remains-from-webs dissected-guts compare-diet-composition arthropod-targeted-COI-primers Illumina-MiSeq highest-diversity highest-richness highest-proportion-prey-reads recovery-of-prey-reads dissected-gut-content low overwhelmed-by-Jorō-spider-DNA high-proportions-Jorō-spider-reads higher-prey-diversity-and-richness detected-prey-DNA several-days-after-capture initial-gut-retention-time-estimates first-glimpse complexity-of-trophic-associations introduced-web-building-spider viable-material source-of-prey-DNA estimates-of-biodiversity Jammu-and-Kashmir northernmost-shifting document-presence behavior habitat-adaptation colder-temperature-environment Goha-Tehsil Doda-district 1556.74-meters road-bridge nearby-vegetation brightly-colored-abdomens black green yellow red long-legs yellow-and-black-bandings predominantly-seen smaller fewer unique-behaviors remaining-motionless-after-disturbances 5-10-meters-of-roads adaptation-to-human-settlements field-observations image-documentation expert-confirmation thrive-in-colder-conditions 15-20-degrees-Celsius October-November no-spider-found higher-elevations significantly-lower-temperatures adaptation-limited-to-milder-cold-regions new-insight adaptation need-for-further-research non-native-habitats eggs overwinter harsh-weather-conditions no-protection compact-silk-case milky-coating chorionic-microspheres CM fine-structural-characteristics ecological-importance uneven-size-distribution outer-eggmass evenly-covered single-layer diameter-2.3-µm short-papillary-projections segmental-adhesion mucous-components insoluble-in-water partially-soluble-in-absolute-ethanol spherical-structure HFIP strong-organic-solvent not-derived-from-vitellogenic-or-choriogenetic-processes CM-adhesive-coatings ovipositional-process equivalent-to-cocoon-silk protective-functions silken-eggcase Northern-Cardinal Cardinalis-cardinalis perches steals-food southeast-of-the-United-States questions native-fauna-affected consuming-prey-items example native-species-deriving-benefit manner-of-kleptoparasitism perched-directly-on-web supported-its-weight 42-48-g first-documented-case spider-web-supporting-perching-bird measurements force-gauge typical-webs support-masses-up-to-70-g small-but-growing-body-of-knowledge non-native-spider species-distribution-models ecological-niche-modeling predict-areas establish-if-introduced three-distinct-genetic-lineages mitochondrial-COI genome-wide-SNPs Korean-Peninsula
Trypoxylon politum
Pipe Organ Mud Dauber, Organ-pipe Mud-dauber Wasp
Trypoxylon politum is a large, solitary spider-hunting wasp and the only North American member of its genus that constructs free-standing mud nests rather than using pre-existing cavities. Its distinctive nest consists of multiple parallel tubular mud columns resembling organ pipes, with each tube internally partitioned into several cells provisioned with paralyzed spiders. The species exhibits cooperative behavior between sexes: males defend nests against parasites and rival males while females hunt and construct. Native to eastern North America, it has shown recent range expansion westward into Colorado and coexists with other mud dauber species.
spider-hunting mud-nest solitary-wasp sexual-conflict range-expansion cooperative-behavior Crabronidae North-America Colorado organ-pipe-nest kairomone-mediated-parasitism non-aggressive cavity-nest-reuse-by-other-species