Hematophagy
Guides
Athericidae
water snipe flies, ibis flies
Athericidae is a small family of flies in the infraorder Tabanomorpha, historically classified within Rhagionidae until separated by Stuckenberg in 1973. The family contains approximately 123 described species distributed worldwide across two subfamilies: Dasyommatinae (monotypic) and Athericinae. Adults are commonly known as water snipe flies or ibis flies. Larvae are strictly aquatic predators in fast-flowing montane streams and torrents, while adults are primarily nectar-feeders with some species exhibiting hematophagy.
Calyptra
Vampire Moths, Fruit-piercing Moths
Calyptra is a genus of moths comprising approximately 18 species, commonly known as vampire moths or fruit-piercing moths. Both sexes possess a modified proboscis with heavily sclerotized, barbed hooks that enables piercing of fruit skins to feed on juices. Males of at least 10 species have been documented piercing mammalian skin to feed on blood, a facultative behavior not observed in females. The genus occurs primarily in the Old World, with one species (C. canadensis) in North America. The blood-feeding behavior is hypothesized to have evolved from ancestral fruit-piercing, with males possibly obtaining salts or carbohydrates to transfer to females during mating.
Cimex
bed bugs, bedbugs
Cimex is a genus of obligate hematophagous insects in the family Cimicidae, commonly known as bed bugs. The genus includes species specialized on different hosts, with C. lectularius (common bed bug) feeding primarily on humans and C. hemipterus (tropical bed bug) occurring in warmer regions. Other species such as C. pipistrelli, C. pilosellus, and C. adjunctus specialize on bats. Bed bugs are wingless, nocturnal parasites that have undergone global resurgence since the late 1990s, likely due to insecticide resistance, changes in pest control practices, and increased international travel.
Cimicinae
bed bug subfamily
Cimicinae is a subfamily of blood-feeding ectoparasites in the family Cimicidae, established by Latreille in 1802. The subfamily includes the most economically significant bed bug species, notably the cosmopolitan human parasites Cimex lectularius and Cimex hemipterus. It represents one of six subfamilies in Cimicidae and occupies a central position in the family's phylogeny.
Corethrella
frog-biting midges
Corethrella is the sole genus in the family Corethrellidae, comprising 132 extant and 10 fossil species. These midges are unique among Diptera in using acoustic cues to locate hosts. Adult females are hematophagous and feed on frog blood, while larvae are aquatic predators. The genus has a predominantly pantropical distribution with fossil records extending to the Lower Cretaceous.
Corethrellidae
frog-biting midges
Corethrellidae are a family of tiny hematophagous flies in the order Diptera. The family contains a single genus, Corethrella, with approximately 105 extant and seven fossil species worldwide. Females are obligate external parasites of frogs, locating hosts by eavesdropping on male anuran mating calls using their Johnston's organ. The family has a fossil record extending to the Lower Cretaceous, approximately 110 million years ago.
Ctenocephalides
cat fleas, dog fleas
Ctenocephalides is a genus of fleas in the family Pulicidae, tribe Archaeopsyllini, containing approximately 13 species and subspecies worldwide. The genus includes two cosmopolitan species of major veterinary and medical importance: C. felis (cat flea) and C. canis (dog flea). These fleas are obligate hematophagous ectoparasites infesting domestic dogs and cats, with C. felis recognized as the most prevalent and economically significant external parasite of companion animals globally. Members of this genus also parasitize diverse wild hosts including foxes, civets, jackals, hares, hyraxes, ground squirrels, and hedgehogs.
Dermacentor
Dog Ticks, American Levi tick
Dermacentor is a genus of hard ticks (family Ixodidae) with 43 recognized species as of 2025. The genus has a cosmopolitan distribution, occurring on all continents except Australia, with most species in the Nearctic ecozone. Members are obligate blood-feeding parasites of mammals, including large ungulates, lagomorphs, and humans. Several species are medically significant vectors of human and animal pathogens, including the agents of Rocky Mountain spotted fever, Q fever, tularemia, and tick paralysis.
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-interfacesynanthropicHaematosiphoninae
Haematosiphoninae is a subfamily of Cimicidae (bed bugs) established in 1912. The group comprises ectoparasitic insects that inhabit bird nests, with documented associations to Psittacidae (parrots) and other avian hosts. Five genera are recognized: Cimexopsis, Ornithocoris, Haematosiphon, Hesperocimex, and Psitticimex, plus the recently described Cyanolicimex. Members are restricted to the Western Hemisphere, with the southernmost records from Río Negro province, Argentina.
Hippobosca
forest flies, flat flies, iron flies
Hippobosca is a genus of louse flies (family Hippoboscidae) comprising seven described species. These obligate hematophagous ectoparasites exhibit dorso-ventrally flattened bodies adapted for clinging to host hair or feathers. Unlike many hippoboscids that shed wings after host colonization, Hippobosca species retain fully developed wings throughout life, functioning as temporary parasites that repeatedly leave hosts between blood meals. The genus has broad distribution across Europe, Asia, and Africa, with some species introduced to other regions. Several species are of veterinary and medical significance as vectors of bacterial and protozoan pathogens.
Ixodes
hard-bodied ticks, blacklegged ticks, deer ticks
Ixodes is a genus of hard-bodied ticks (family Ixodidae) comprising approximately 274 species with a near-cosmopolitan distribution. It is the sole representative of the Prostriata clade, distinguished from Metastriata by an anal groove that loops anterior to the anus. Many species serve as important disease vectors, transmitting pathogens including Borrelia burgdorferi (Lyme disease), Babesia microti (babesiosis), and Anaplasma phagocytophilum (anaplasmosis). Some species, notably Ixodes holocyclus, inject neurotoxins that can cause tick paralysis.
Ixodida
ticks
Ixodida is the order comprising ticks, obligate blood-feeding arachnids within the subclass Acari. The order includes approximately 850-1000 described species worldwide, classified into three families: Ixodidae (hard ticks), Argasidae (soft ticks), and Nuttalliellidae (a monotypic family). Ticks are ectoparasites of mammals, birds, and reptiles, with significant medical and veterinary importance as vectors of bacterial, viral, protozoan, and rickettsial pathogens. They possess a unique life cycle involving multiple developmental stages and host associations.
Ixodidae
hard ticks, hard-backed ticks, scale ticks
Ixodidae is the family of hard ticks, one of two major tick families, distinguished from soft ticks (Argasidae) by the presence of a scutum—a hard dorsal shield. As of 2025, the family comprises approximately 769 species in 18 extant genera. Members are obligate ectoparasites of vertebrates and are significant vectors of pathogens causing diseases in humans, livestock, and wildlife.
Lipoptena
deer ked, louse fly, ked fly
Lipoptena is a genus of louse flies (family Hippoboscidae) comprising approximately 30 described species of obligate blood-feeding ectoparasites primarily associated with deer and other cervids. Adults are initially winged but shed their wings upon locating a host, becoming permanently attached and resembling ticks in appearance. Several species have expanded their ranges through human-mediated transport of hosts, with L. cervi (European deer ked) now invasive in northeastern North America. Members of this genus are increasingly recognized as nuisance pests for hunters and outdoor recreationists, and as potential vectors of bacterial pathogens including Bartonella species.
Lipopteninae
Lipopteninae is a subfamily of louse flies (Hippoboscidae) comprising three genera: Lipoptena, Melophagus, and Neolipoptena. All members are obligate ectoparasites of mammals. The subfamily was established by Speiser in 1908. Species in this group exhibit morphological adaptations for clinging to host fur or hair, including dorsoventrally flattened bodies and strong claws. Notable species include the deer ked (Lipoptena cervi) and the sheep ked (Melophagus ovinus), both of which are economically significant parasites.
Macronyssidae
Macronyssidae is a family of parasitic mites in the order Mesostigmata, established by Oudemans in 1936. Members are obligate ectoparasites of vertebrates, primarily infesting reptiles, birds, and mammals. The family includes economically significant pests such as the northern fowl mite (Ornithonyssus sylviarum) and the tropical rat mite (Ornithonyssus bacoti), as well as the snake mite (Ophionyssus natricis). Macronyssids are hematophagous and have been documented as vectors of pathogens including Rickettsia and Bartonella species.
Menoponidae
chicken body lice, chicken body louse family
Menoponidae is a family of chewing lice (suborder Amblycera) comprising ectoparasites of birds. They are frequently called the chicken body louse family due to the economic importance of species like Menacanthus stramineus on poultry, though the family parasitizes diverse avian hosts including migratory birds and passerines. Members possess short antennae concealed in grooves behind the eyes, and many retain partial dependence on blood-feeding through specialized mouthparts such as the hypopharynx. This hematophagous capability allows broader host distribution and reduced microhabitat specialization compared to other chewing lice.
Ornithomya
bird louse flies
Ornithomya is a genus of louse flies (family Hippoboscidae) comprising approximately 31 species of obligate avian ectoparasites. All species are blood-feeding parasites of birds, primarily Passeriformes. Adults are dorsoventrally flattened with reduced or absent wings in many individuals. The genus exhibits adenotrophic viviparity, with larvae developing entirely within the female and deposited as fully mature third instars that immediately pupate. Species show varying degrees of host specificity correlated with bird nesting ecology.
Pediculidae
Ape Lice
Pediculidae is a family of sucking lice (suborder Anoplura) that includes obligate ectoparasites of primates. The family contains Pediculus humanus, the human head and body louse, which exists as two morphologically similar but ecologically distinct forms: P. h. capitis (head louse) and P. h. humanus (body louse). Pediculidae also includes P. schaeffi, which infests chimpanzees and bonobos. These lice are wingless, dorsoventrally flattened insects with specialized mouthparts for piercing skin and feeding on blood. They complete their entire life cycle on the host and are of significant medical importance as vectors of epidemic typhus, trench fever, and relapsing fever.
Pediculus
sucking lice
Pediculus is the sole genus in the family Pediculidae, comprising obligate ectoparasitic sucking lice that infest primates. The genus includes species specialized to exploit distinct microhabitats on their hosts: Pediculus humanus humanus (body louse) inhabits clothing and body hair, while P. humanus capitis (head louse) is restricted to scalp hair. These insects are dorsoventrally flattened, wingless, and possess highly modified legs with clawed tarsi adapted for gripping hair shafts. All species feed exclusively on blood, making them significant pests and disease vectors of humans.
Pediculus humanus
Human Louse
Pediculus humanus is an obligate ectoparasite of humans comprising two subspecies: P. h. humanus (body louse) and P. h. capitis (head louse). This wingless insect has been associated with humans throughout recorded history and serves as a vector for several serious human diseases including epidemic typhus, trench fever, and relapsing fever. The body louse is larger and more robust than the head louse, with females capable of laying up to 295 eggs in their lifetime under optimal conditions. Both subspecies feed exclusively on human blood and complete their entire life cycle on the host.
Pediculus humanus capitis
Human Head Louse, Head Louse
The human head louse is an obligate ectoparasite specialized for life on human scalp hair. Unlike its close relative the body louse, it has remained associated with hair rather than clothing throughout human evolution. Populations in many regions have developed widespread resistance to pyrethrin and permethrin insecticides, complicating control efforts. Transmission occurs primarily through direct head-to-head contact, with infestations clustering in settings where children interact closely.
Protocalliphora
bird blowflies, bird blow flies
Protocalliphora is a genus of blow flies (Calliphoridae) comprising obligate hematophagous parasites of birds. Larvae develop in bird nests and feed on the blood of nestlings, with more than 140 bird species recorded as hosts. The genus is distributed across the Holarctic region (Nearctic and Palaearctic). Adults overwinter and exhibit complex interactions with Wolbachia endosymbionts that complicate species identification through DNA barcoding.
Pulex irritans
Human Flea, House Flea
Pulex irritans is a cosmopolitan flea species commonly known as the human flea. Despite its name, it has a broad host range including humans, dogs, cats, livestock, and various wild mammals. The species is thought to have originated in South America, possibly associated with guinea pigs or peccaries as original hosts. It is one of only six species in the genus Pulex, with the other five restricted to Nearctic and Neotropical regions. P. irritans has been found in human archaeological sediments dating back thousands of years in Europe and Greenland, demonstrating its long association with human populations. The species is medically significant as a potential vector of plague (Yersinia pestis), murine typhus, trench fever (Bartonella quintana), flea-borne spotted fever (Rickettsia felis), and the tapeworm Dipylidium caninum.
Reduviidae
Assassin Bugs, Ambush Bugs, Kissing Bugs, Wheel Bugs, Thread-legged Bugs, Bee Assassins, Millipede Assassins, Masked Hunters
Reduviidae is a large cosmopolitan family of true bugs (Hemiptera: Heteroptera) comprising approximately 7,000 described species across more than 20 subfamilies. The family is predominantly terrestrial and predatory, with members employing diverse hunting strategies including ambush predation, active pursuit, and specialized prey capture using modified forelegs or sticky secretions. A notable exception is the subfamily Triatominae, whose members are hematophagous ectoparasites of vertebrates and vectors of Chagas disease. Most species possess a distinctive narrow neck, sturdy body, and curved proboscis that fits into a stridulatory groove on the prosternum, producing sound when rubbed against ridges. The family exhibits remarkable morphological diversity, with body sizes ranging from 12 to 36 mm and coloration spanning cryptic browns and blacks to aposematic reds, oranges, and metallic blues.
Stomoxys
stable flies
Stomoxys is a genus of muscid flies distinguished by its blood-feeding ectoparasitic lifestyle, unusual among the Muscidae. The genus comprises approximately 20 described species, with Stomoxys calcitrans (stable fly) being the most economically significant and widely distributed. Species in this genus are obligate hematophages of mammals, causing substantial livestock losses through blood loss, stress, and disease transmission. Current phylogenetic evidence suggests the genus is paraphyletic.
Tabanomorpha
Snipe Flies and Allies
Tabanomorpha is a brachyceran infraorder of Diptera comprising primarily two large families—Tabanidae (horse and deer flies) and Rhagionidae (snipe flies)—along with several smaller affiliated families including Athericidae, Vermileonidae, Austroleptidae, Oreoleptidae, Spaniidae, and Pelecorhynchidae. The group is notable as one of only two brachyceran lineages outside Hippoboscoidea containing blood-feeding (hematophagous) species, though they are not significant disease vectors. Phylogenetic relationships among constituent families remain unresolved.
Tabanus atratus
Black Horse Fly
Tabanus atratus, commonly known as the black horse fly, is a large, all-black species of horse fly in the family Tabanidae. It is one of the largest horse flies in North America, with body lengths ranging from 20–25 mm. Females are blood-feeders with scissor-like mouthparts used to cut skin and lap blood, while males have reduced mouthparts and do not feed on blood. The species is recognizable by its uniform black coloration and distinctively hooked antennae. Females lay eggs in large masses of 100–1000 eggs near water's edge, with each female capable of producing three to four egg masses.
Tabanus catenatus
Chained Horse Fly
Tabanus catenatus is a large horse fly species in the family Tabanidae, measuring 19–25 mm in body length. It is commonly known as the Chained Horse Fly and occurs in the eastern United States and southeastern Canada. Like other horse flies, it belongs to a group of biting flies known for their blood-feeding behavior, with females requiring blood meals for egg development.
Triatoma indictiva
kissing bug
Triatoma indictiva is a blood-sucking assassin bug in the subfamily Triatominae, commonly known as a "kissing bug." It is a documented vector of Trypanosoma cruzi, the protozoan parasite that causes Chagas disease. The species occurs in Mexico and the southern United States, particularly Arizona and Texas. Adults measure 20–30 mm in length and are characterized by a pear-shaped body, black coloration with red lateral markings, and a tapered proboscis. Like other triatomines, it is primarily associated with vertebrate hosts in natural and peridomestic habitats.