Aquatic Insects

Species found in freshwater habitats

200 species in this collection

Browse by order: Coleoptera (134) Collembola (2) Dermaptera (1) Diptera (61) Ephemeroptera (2)
Coleoptera

African Bombardier Beetle

Stenaptinus insignis

A large, brightly colored bombardier beetle found across sub-Saharan Africa. Its yellow and dark-blue markings serve as ...

Coleoptera

African Diving Beetle

Cybister tripunctatus

A large diving beetle widespread across Africa and southern Asia. It is one of the most common large aquatic beetles in ...

Coleoptera

African Firefly

Luciola africana

A Sub-Saharan African firefly with a dark brown body and pale pronotal margins. It is one of the few well-documented fir...

Coleoptera

African Myrmecophile Rove Beetle

Dorylomimus kohli

A rove beetle that lives with army ant colonies in tropical Africa, mimicking the ants in body shape. It travels with th...

Coleoptera

African Whirligig Beetle

Dineutus aereus

A bronze-colored whirligig beetle common across sub-Saharan African freshwater habitats. It swims rapidly in circles on ...

Coleoptera

Agonum Marsh Ground Beetle

Agonum marginatum

A medium-sized metallic green ground beetle with pale-margined elytra found exclusively in wetland habitats. It runs rap...

Coleoptera

Alder Leaf Beetle

Agelastica alni

A metallic dark violet-blue beetle that feeds on alder trees. Heavy infestations can completely defoliate alder trees al...

Coleoptera

Australian Diving Beetle

Cybister godeffroyi

A large olive-green diving beetle found in freshwater habitats across Australia. It is one of the most commonly encounte...

Coleoptera

Bethany Beach Firefly

Photuris bethaniensis

A predatory firefly known from a narrow range along the mid-Atlantic coast. Females mimic the flash patterns of other fi...

Coleoptera

Big Sand Tiger Beetle

Cicindela formosa

A large and colorful tiger beetle found in sandy habitats across North America. Its color varies from bright red to dark...

Coleoptera

Big-headed Tiger Beetle

Megacephala virginica

A nocturnal tiger beetle with a disproportionately large head and long curved mandibles. It is dark brown to black and h...

Coleoptera

Blue Flea Beetle

Altica lythri

A small metallic blue-green flea beetle that feeds on willowherb and evening primrose. Has enlarged hind femora enabling...

Coleoptera

Blue Margined Ground Beetle

Chlaenius impunctifrons

A brilliantly colored ground beetle with bright metallic blue-green elytra and a velvety texture from fine pubescence. I...

Coleoptera

Blue Mint Beetle

Chrysolina coerulans

A small, deep metallic blue leaf beetle found exclusively on mint plants. Both adults and larvae feed on mint foliage....

Coleoptera

Blue Paederine Rove Beetle

Paederus balcanicus

A colorful Paederus rove beetle with metallic blue elytra and an orange thorax, found in southeastern Europe. Like all P...

Coleoptera

Bombardier Beetle

Brachinus crepitans

Defends itself with a boiling-hot chemical spray ejected from its abdomen at over 100°C. The reaction involves mixing hy...

Coleoptera

Bordered Great Diving Beetle

Dytiscus circumflexus

A large British diving beetle similar to D. marginalis but with expanded yellow margins. It prefers larger, more permane...

Coleoptera

Borneo Firefly

Pteroptyx bearni

A synchronous firefly endemic to Borneo that creates dramatic light displays in riverside trees. It congregates in speci...

Coleoptera

Borneo Pulsing Firefly

Pteroptyx tener

A synchronous firefly of Southeast Asian mangroves that produces green flashes in unison with thousands of others. Massi...

Coleoptera

Brassy Willow Beetle

Phratora vitellinae

A small, shiny metallic bronze to greenish beetle that feeds on willow and poplar. Adults overwinter in leaf litter and ...

Coleoptera

Broad-shouldered Diving Beetle

Dytiscus latissimus

The largest European diving beetle and one of the largest aquatic beetles in the world. It inhabits clean, fish-poor lak...

Coleoptera

Bronze Flea Beetle

Altica ambiens

A metallic bronze to greenish flea beetle with prominent hind leg development. It feeds on alder leaves in wetland habit...

Coleoptera

Brown Willow Beetle

Galerucella lineola

A small brown beetle that feeds on willow leaves and can cause significant defoliation. Has been used as a biological co...

Coleoptera

Chinese Aquatic Firefly

Aquatica ficta

A firefly with fully aquatic larvae found in streams across southern China. It was the first species placed in the genus...

Coleoptera

Chinese Water Penny Beetle

Eubrianax pellucidus

A water penny beetle found in southern China whose translucent larval margins allow gas exchange with the water. Adults ...

Coleoptera

Claudius Ground Beetle

Carabus clathratus

A large bronze or coppery-black ground beetle with distinctive chain-like patterning on its elytra formed by rows of rai...

Coleoptera

Columbia Tiger Beetle

Cicindela columbica

A rare tiger beetle known from sandy riverbanks in the Pacific Northwest. It is an agile predator that chases down small...

Coleoptera

Colymbetes Diving Beetle

Colymbetes fuscus

A medium-sized diving beetle with finely lined yellowish-brown elytra found across Europe. It inhabits a wide range of s...

Coleoptera

Common Sun Beetle

Elaphrus cupreus

A small, brilliantly metallic copper-green beetle with distinctive eye-like pits on its elytra. It runs rapidly on wet m...

Coleoptera

Common Water Penny

Psephenus herricki

A small aquatic beetle whose larvae are flattened and round like a copper penny, clinging to rocks in fast streams. Adul...

Coleoptera

Coppery Chlaenius

Chlaenius cumatilis

A medium-sized ground beetle with brilliant metallic blue-green coloring and fine pubescence covering its elytra. It is ...

Coleoptera

Cottonwood Borer

Plectrodera scalator

A large longhorn beetle with bold black and white patterning and long antennae. Its larvae bore into the roots and lower...

Coleoptera

Cottonwood Stag Beetle

Lucanus mazama

A medium-sized North American stag beetle found near river bottoms. Males have moderately large mandibles....

Coleoptera

Crawling Water Beetle

Haliplus ruficollis

A tiny, oval water beetle with a yellowish body covered in rows of dark punctures. Unlike diving beetles, it crawls slow...

Coleoptera

Creek Pacer Ground Beetle

Chlaenius tricolor

A handsome ground beetle with bright metallic green elytra, a bluish pronotum, and reddish-brown legs. It is commonly fo...

Coleoptera

Delta Green Ground Beetle

Elaphrus viridis

A small metallic green ground beetle found only near vernal pools in Solano County, California. It is threatened by urba...

Coleoptera

Dimple-back Ground Beetle

Elaphrus riparius

A small, fast-running beetle with distinctive cup-shaped depressions on its elytra that create a dimpled appearance. It ...

Coleoptera

Diving Beetle

Dytiscus marginalis

A large, streamlined aquatic beetle with an olive-green body bordered in yellow. It carries an air bubble under its elyt...

Coleoptera

Downy Leatherwing

Podabrus tomentosus

A North American soldier beetle covered in fine pubescence, found on flowers and foliage in summer. It is an effective p...

Coleoptera

Elderberry Borer

Desmocerus palliatus

A striking longhorn beetle with cobalt blue wing covers and a bright yellow-orange base. Its larvae develop inside the s...

Coleoptera

Elongate Paederine

Lathrobium elongatum

A very slender, reddish-brown paederine rove beetle that lives deep within waterlogged soils near streams. Its extremely...

Coleoptera

Epomis Ground Beetle

Epomis dejeani

A beetle whose larvae lure and devour frogs — a rare case of predator-prey role reversal. The larva waggles its antennae...

Coleoptera

Fen Rove Beetle

Stenus providus

A tiny rove beetle of wetland margins with exceptionally large eyes for a beetle its size. Uses a retractable sticky lab...

Coleoptera

Figwort Weevil

Cionus scrophulariae

A globular weevil with checkerboard black and white patterning found on figwort and mullein. Larvae feed externally on l...

Coleoptera

Flat-Horned Dung Beetle

Onthophagus planicornis

A small, dark tunneling dung beetle with laterally flattened horns in major males. Found in tropical Africa, it is a rap...

Coleoptera

Fleabane Tortoise Beetle

Cassida murraea

A striking red-brown and black tortoise beetle associated with fleabane plants. Has characteristic dark markings on the ...

Coleoptera

Florida Predatory Firefly

Photuris frontalis

A large predatory firefly found in the southeastern United States that exhibits synchronous flashing behavior. Males pro...

Coleoptera

Giant Black Water Beetle

Hydrophilus triangularis

The largest water beetle in North America, with a shiny black oval body. Larvae are voracious predators while adults are...

Coleoptera

Giant Swamp Leaf Beetle

Donacia provostii

One of the larger species of reed beetle, with a metallic golden-green to coppery body and distinctive long antennae. Ad...

Coleoptera

Golden Reed Beetle

Donacia vulgaris

A slender, metallic beetle with golden to coppery-green coloration and elongated antennae. It is commonly found resting ...

Coleoptera

Granulated Ground Beetle

Carabus granulatus

A widespread dark bronze ground beetle with distinctly ridged and granulated wing cases. It thrives in damp habitats nea...

Coleoptera

Green Mangrove Tiger Beetle

Myriochila mastersi

A metallic green tiger beetle that inhabits mangrove mud flats and tidal zones along the northern Australian coast. It i...

Coleoptera

Green Tortoise Beetle

Cassida viridis

A broadly oval, flattened beetle that is bright green in life, with transparent margins around the pronotum and elytra. ...

Coleoptera

Hairy Whirligig Beetle

Orectochilus villosus

A nocturnal whirligig beetle covered in fine golden hairs that trap air underwater. Unlike other whirligigs it hides und...

Coleoptera

Harris's Diving Beetle

Dytiscus harrisii

A large North American diving beetle found in cold, clear lakes and bog ponds. It is one of the largest diving beetles o...

Coleoptera

Horn-headed Rove Beetle

Bledius tricornis

A small rove beetle in which males bear three horn-like projections on the head, used in combat for burrow ownership. It...

Coleoptera

Indian Tiger Beetle

Cicindela aurulenta

A brilliantly metallic green tiger beetle with coppery-red margins on the elytra. It is an agile predator that runs swif...

Coleoptera

Iris Flea Beetle

Aphthona nonstriata

A small blue-green flea beetle associated with yellow iris in wetland habitats. Larvae feed on iris roots underwater. A ...

Coleoptera

Japanese Diving Beetle

Cybister japonicus

A large diving beetle native to Japan, once common but now increasingly rare. It has suffered severe declines due to hab...

Coleoptera

Japanese Genji Firefly

Luciola cruciata

An aquatic-larval firefly revered in Japanese culture, found near clean streams. It is one of the few fireflies whose la...

Coleoptera

Japanese Tiger Beetle

Cicindela japonica

A common and widespread tiger beetle across Japan with variable coloring from green to coppery brown. It frequents sunny...

Coleoptera

Japanese Whirligig Beetle

Gyrinus japonicus

A common whirligig beetle in East Asia found on still and slow-flowing water surfaces. It forms large social groups espe...

Coleoptera

Jet Beetle

Stenus comma

A tiny, goggle-eyed rove beetle that hunts with a remarkable extendable labium tipped with adhesive pads. It can also sk...

Coleoptera

Large Elm Beetle

Oulimnius tuberculatus

A small, robust riffle beetle found throughout European streams. Adults have a distinctive tuberculate surface texture o...

Coleoptera

Large Whirligig Beetle

Dineutus americanus

The largest North American whirligig beetle, found on the surface of streams and rivers. It produces defensive chemicals...

Coleoptera

Lesser Silver Water Beetle

Hydrochara flavipes

A medium-sized water scavenger beetle found in still waters across East Asia. Its legs have distinctive yellowish tarsi....

Coleoptera

Long-Toed Water Beetle

Stenelmis crenata

A small riffle beetle with elongated tarsal claws for gripping rocks in fast currents. Both adults and larvae are entire...

Coleoptera

Loricera Bristly Ground Beetle

Loricera pilicornis

A small, distinctive ground beetle with uniquely modified antennae bearing long bristles. These bristle-fringed antennae...

Coleoptera

Luminous Beetle of Ulu Selangor

Pteroptyx similis

A tiny synchronous firefly found along rivers in Malaysia. Males congregate by the hundreds in berembang trees along tid...

Coleoptera

Malagasy Aquatic Beetle

Hydrophilus madagascariensis

A large, shiny black aquatic beetle with a streamlined oval body. It carries a bubble of air beneath its body for underw...

Coleoptera

Malagasy Firefly

Luciola madagascariensis

A soft-bodied beetle with a yellowish pronotum and dark elytra, producing a steady green bioluminescent glow from its ab...

Coleoptera

Malaysian Firefly

Pteroptyx valida

A synchronous firefly of Malaysian rivers that creates spectacular congregation displays. It is a key species for firefl...

Coleoptera

Metallic Green Leaf Beetle

Plagiodera versicolora

A small, rounded beetle with shiny metallic blue-green to dark green elytra. It is one of the most common willow-feeding...

Coleoptera

Mint Leaf Beetle

Chrysolina herbacea

A brilliant metallic green beetle that feeds exclusively on mint plants. Its coppery-green sheen makes it one of the mos...

Coleoptera

Miyako Firefly

Luciola filiformis

A small Japanese firefly found on Miyako Island with a slender body and greenish-yellow luminescence. It has a limited d...

Coleoptera

Narrow-bordered Bombardier

Brachinus sclopeta

A Mediterranean bombardier beetle with a narrow body and orange-brown coloring. It shelters communally under stones in d...

Coleoptera

Nebria Streamside Beetle

Nebria brevicollis

A very common European ground beetle often found near streams and in damp habitats. It is active year-round including du...

Coleoptera

Nettle-tap Flea Beetle

Longitarsus nasturtii

A tiny yellowish-brown flea beetle found on watercress and other crucifers in damp habitats. Larvae mine in plant roots....

Coleoptera

Noterus Diving Beetle

Noterus clavicornis

A small, oval, yellowish-brown diving beetle with distinctively thickened antennae. It is widespread across Europe in st...

Coleoptera

Okinawan Firefly

Luciola owadai

A subtropical firefly endemic to the Ryukyu Islands with a small dark body and rapid greenish flash. It is one of severa...

Coleoptera

Oregon Tiger Beetle

Cicindela oregona

A variable-colored tiger beetle found in open sandy and gravelly habitats across western North America. Coloring ranges ...

Coleoptera

Painted Reed Beetle

Plateumaris sericea

A brilliantly metallic leaf beetle found on aquatic plants, varying from green to blue, copper, or purple. Larvae feed o...

Coleoptera

Papuan Synchronous Firefly

Pteroptyx cribellata

A tropical firefly with a soft brownish body and prominent light organs. Found in New Guinea, it forms large synchronous...

Coleoptera

Pedilus Beetle

Notoxus monoceros

A small ant-like beetle with a distinctive forward-pointing horn on the thorax. Found on sandy ground and under debris. ...

Coleoptera

Pictured Rove Beetle

Paederus littoralis

A slender black and orange rove beetle with short elytra exposing most of its abdomen. It contains the toxin pederin whi...

Coleoptera

Ponderous Borer

Trichocnemis spiculatus

One of the largest cerambycids in North America, this prionine breeds in the roots and lower trunks of dead ponderosa pi...

Coleoptera

Predaceous Diving Beetle

Cybister lateralimarginalis

A large olive-green diving beetle found across southern Europe and Africa. It is a powerful swimmer that hunts a range o...

Coleoptera

Purple Loosestrife Beetle

Galerucella calmariensis

A small, yellowish-brown beetle deliberately introduced as a biocontrol agent against invasive purple loosestrife. Adult...

Coleoptera

Rainbow Leaf Beetle

Chrysolina fastuosa

A metallic multicolored beetle with iridescent green, blue, and purple stripes....

Coleoptera

Red and Black Rove Beetle

Paederus riparius

A small but notorious rove beetle with a red thorax and abdomen and blue-black elytra. Its hemolymph contains pederin, a...

Coleoptera

Red Poplar Leaf Beetle

Chrysomela populi

A shiny red-orange beetle with a black head, commonly found on poplar and willow trees. Larvae release a pungent salicyl...

Coleoptera

Reed Beetle

Donacia crassipes

A striking aquatic leaf beetle with metallic golden-green to coppery elytra and elongated hind legs. It is one of the la...

Coleoptera

Rice Water Weevil

Lissorhoptrus oryzophilus

A small, grey-brown weevil that feeds on rice roots as a larva and on rice leaves as an adult. Adults create distinctive...

Coleoptera

Ridged Water Scavenger Beetle

Helochares obscurus

A small brown water beetle found in well-vegetated ponds across Europe. Females carry their egg sacs beneath the body un...

Coleoptera

Riffle Beetle

Elmis aenea

A tiny, dark beetle that spends its entire adult life underwater clinging to rocks in riffles. It breathes using a plast...

Coleoptera

Round Sand Beetle

Omophron limbatum

A highly distinctive, nearly circular ground beetle with a domed shape and striking pattern of pale yellow with dark gre...

Coleoptera

Salt Creek Tiger Beetle

Cicindela nevadica lincolniana

One of the rarest insects in the world, this small tiger beetle has dark olive-brown elytra with faint white markings. I...

Coleoptera

Salt Flat Tiger Beetle

Eunota togata

A pale whitish tiger beetle adapted to saline environments in western North America. Its light coloring provides camoufl...

Coleoptera

Say's Firefly

Pyractomena angulata

An early-season firefly with amber-orange flashes seen in spring across eastern North America. It is among the first fir...

Coleoptera

Scarlet Minivet Beetle

Lycostomus modestus

A net-winged beetle with conspicuous orange-red elytra featuring a reticulate pattern of raised veins. It is soft-bodied...

Coleoptera

Screech Beetle

Hygrobia hermanni

A medium-sized, reddish-brown water beetle that produces an audible squeaking sound when handled. It is found in muddy p...

Coleoptera

Sharp-Grooved Diving Beetle

Acilius sulcatus

A medium-sized diving beetle widespread across Europe, recognized by the deeply grooved elytra of females. It is a fast ...

Coleoptera

Shore Rove Beetle

Philonthus quisquiliarius

A small metallic greenish rove beetle found along pond and river margins in marshy habitats. Hunts small invertebrates i...

Coleoptera

Shoreline Rove Beetle

Bledius spectabilis

A burrowing rove beetle that constructs vertical tunnels in salt marsh mud. It feeds on algae scraped from wet sediment ...

Coleoptera

Silky Chlaenius

Chlaenius vestitus

A medium-sized ground beetle covered in fine silky pubescence giving it a velvety green appearance. It is commonly found...

Coleoptera

Sloane's Tiger Beetle

Pseudotetracha sloaneae

A rare nocturnal tiger beetle endemic to inland salt lakes of southern Australia. It has unusually large eyes and long l...

Coleoptera

South American Giant Diving Beetle

Megadytes ducalis

One of the largest diving beetles in South America with a glossy dark olive body. It inhabits large rivers and lakes of ...

Coleoptera

South American Whirligig Beetle

Gyrinus ovatus

A widespread whirligig beetle found across temperate and tropical regions of the Americas. It is highly gregarious and f...

Coleoptera

Spotted Diving Beetle

Graphoderus cinereus

A medium-sized diving beetle with distinctive mottled brown and cream patterning. It inhabits clean, well-vegetated pond...

Coleoptera

Stenus Jet Rove Beetle

Stenus bimaculatus

A small rove beetle with bulging eyes and an extensible sticky labium used to capture springtails. It can skim across wa...

Coleoptera

Stinking Longhorn

Aromia moschata ambrosiaca

A subspecies of the musk beetle with even more intense metallic coloring and a slightly different fragrance....

Coleoptera

Striped Crawling Water Beetle

Haliplus lineaticollis

A small yellowish-brown beetle with distinctive dark longitudinal stripes on the pronotum. It is commonly found in weedy...

Coleoptera

Striped Whirligig Beetle

Gyrinus substriatus

A small whirligig beetle common across Europe, with fine longitudinal lines on the elytra. It aggregates in large swarms...

Coleoptera

Sunburst Diving Beetle

Thermonectus marmoratus

A striking yellow-and-black spotted diving beetle from the American Southwest and Mexico. Its larvae have been discovere...

Coleoptera

Synchronous Firefly of India

Pteroptyx maipo

A small firefly known for its remarkable ability to synchronize its flashing with neighboring individuals. Mangrove tree...

Coleoptera

Tansy Beetle

Chrysolina graminis

A stunning metallic green and copper beetle covered in tiny pits. It is one of the rarest beetles in Britain....

Coleoptera

Thai Aquatic Firefly

Luciola aquatilis

A small Thai firefly notable for having truly aquatic larvae with functional gills. It was one of the first fireflies co...

Coleoptera

Thai Synchronous Firefly

Pteroptyx malaccae

A synchronous firefly of Southeast Asian mangroves that gathers in large congregations. Males synchronize their flashes ...

Coleoptera

Tropical Giant Whirligig Beetle

Dineutus indicus

A large whirligig beetle found on the surfaces of tropical ponds and slow rivers across South Asia. It forms impressive ...

Coleoptera

Tropical Rove Beetle

Erichsonius cinerascens

A small, greyish rove beetle found in marshy habitats and pond margins. It is a useful bioindicator of wetland health....

Coleoptera

Turk's Tiger Beetle

Cephalota turcica

A distinctive tiger beetle found on saline lake shores and mudflats across Turkey and the Middle East. Its pale markings...

Coleoptera

Twelve-Lined Whirligig Beetle

Gyrinus minutus

One of the smallest European whirligig beetles, found in clean ponds and lakes. It is often overlooked due to its diminu...

Coleoptera

Two-spotted Jet Beetle

Stenus bipunctatus

A small black rove beetle with two distinctive reddish spots on its elytra and greatly enlarged compound eyes. It is an ...

Coleoptera

Water Scavenger Beetle

Hydrophilus piceus

One of the largest European water beetles, with a glossy black, boat-shaped body. Despite its name, it is largely herbiv...

Coleoptera

Water Spinach Flea Beetle

Chaetocnema basalis

A tiny, shiny dark bronze to black flea beetle that is a significant pest of rice seedlings and water spinach across tro...

Coleoptera

Water-lily Reed Beetle

Donacia simplex

A metallic coppery-bronze aquatic beetle with longitudinal ridges on the elytra. Adults sit on floating leaves of pondwe...

Coleoptera

Waterlily Leaf Beetle

Galerucella nymphaeae

A small, brown leaf beetle that feeds on the upper surfaces of waterlily pads. It creates distinctive feeding grooves ac...

Coleoptera

West African Firefly

Luciola lusitanica

A small soft-bodied beetle that produces bioluminescent flashes to attract mates. Males fly and flash while females resp...

Coleoptera

West African Tiger Beetle

Megacephala megacephala

A large, nocturnal tiger beetle with a broad head and powerful mandibles. The body is dark brown to black with subtle me...

Coleoptera

Whip-scorpion Rove Beetle

Paederus amazonicus

A brightly colored Amazonian rove beetle with orange and metallic blue markings typical of the Paederus genus. It thrive...

Coleoptera

Whirligig Beetle

Gyrinus natator

A small, oval, shiny black beetle that spins in rapid circles on the water surface. Its eyes are divided in two, allowin...

Coleoptera

Whirligig Diving Beetle

Macrogyrus oblongus

A large whirligig beetle that spins on the water surface of African rivers....

Coleoptera

Willow Calligrapha

Calligrapha multipunctata bigsbyana

A subspecies of Calligrapha with pale elytra marked with elongated dark spots and dashes. It is associated with willow t...

Coleoptera

Yellow-Margined Water Scavenger Beetle

Hydrochara caraboides

A large dark water scavenger beetle with yellowish margins on the pronotum. It inhabits well-vegetated ponds and is decl...

Collembola

Marsh Springtail

Isotomurus palustris

A colorful elongate springtail found near ponds, streams, and marshy areas. Its color varies from green to orange depend...

Collembola

Water Springtail

Podura aquatica

A distinctive dark-colored springtail found on the surface of still freshwater. It is the only species in its family and...

Dermaptera

Striped Earwig

Labidura riparia

A large, pale sandy-brown earwig with dark longitudinal stripes, commonly found near water. It is one of the most widesp...

Diptera

African Horse Fly

Tabanus biguttatus

A large tropical horse fly that transmits animal trypanosomiasis in Africa. It is an important veterinary pest across su...

Diptera

African Malaria Mosquito

Anopheles funestus

A major malaria vector in sub-Saharan Africa whose larvae develop in slow-moving stream margins. Prefers shaded, vegetat...

Diptera

American Horse Fly

Tabanus americanus

One of the largest horse flies in North America with a dark brown body and conspicuous green or purple iridescent eyes. ...

Diptera

Aquatic Crane Fly

Antocha saxicola

A small crane fly whose larvae build silken cases on submerged rocks in fast-flowing streams. Larvae are true aquatic in...

Diptera

Aquatic Snail-killing Fly

Sepedon sphegea

A slender marsh fly with a distinctly pointed abdomen and yellowish-brown coloring. Larvae are aquatic predators of fres...

Diptera

Arctic Chironomid Midge

Diamesa mendotae

A slender, non-biting midge with long legs and feathery antennae in males. Larvae are among the first invertebrates to c...

Diptera

Balloon Dance Fly

Hilara maura

A dance fly famous for its elaborate mating ritual in which males present silk-wrapped prey gifts to females. Males spin...

Diptera

Banded Blackfly

Simulium ornatum

A widespread European black fly species complex found in diverse stream types. Larvae filter-feed from silken pads attac...

Diptera

Banded General Soldier Fly

Stratiomys potamida

A large, boldly marked soldier fly with a broad flat abdomen bearing yellow lateral markings. Its aquatic larvae are elo...

Diptera

Black-Tailed Deer Fly

Chrysops niger

A small dark deer fly with mostly blackened wings and green iridescent eyes. It is an aggressive daytime biter commonly ...

Diptera

Blandford Fly

Simulium posticatum

A notorious black fly that causes severe allergic reactions with its bite around the Blandford area of Dorset. Females n...

Diptera

Brine Fly

Ephydra hians

A fly that thrives in the extremely alkaline waters of Mono Lake....

Diptera

Cold-water Glacier Midge

Diamesa cinerella

A cold-adapted midge found in high-altitude streams fed by snowmelt. Its larvae are among the first colonizers of newly ...

Diptera

Common House Mosquito

Culex pipiens

A ubiquitous pale brown mosquito found in urban and suburban environments. It is the primary vector of West Nile virus i...

Diptera

Common Malaria Mosquito

Anopheles quadrimaculatus

A freshwater mosquito that was the primary malaria vector in the eastern United States. Larvae float horizontally at the...

Diptera

Comstock's Net-Winged Midge

Agathon comstocki

A western North American net-winged midge found on waterfall-splashed rocks. Larvae have a unique caterpillar-like body ...

Diptera

Dance Fly with Feathered Legs

Rhamphomyia sulcata

A small dance fly where females have distinctive feathered or pennate leg scales used to attract males. Females inflate ...

Diptera

Downlooker Fly

Rhagio tringarius

A slender predatory fly with spotted wings that perches head-downward on vegetation waiting for prey....

Diptera

Drone Fly

Eristalis tenax

A large hoverfly that is an excellent mimic of the honey bee, complete with similar coloring and buzzing flight. Its aqu...

Diptera

Fuscipes Tsetse Fly

Glossina fuscipes

A small riverine tsetse fly that is the major vector of Trypanosoma brucei gambiense in Central and East Africa. It inha...

Diptera

Giant Crane Fly

Tipula maxima

The largest European crane fly, with marbled wings spanning up to 65 mm. Larvae develop in wet leaf litter along stream ...

Diptera

Glacier Midge

Diamesa steinboecki

A remarkable midge that completes its entire life cycle in glacial streams at temperatures near 0C. Represents one of th...

Diptera

Golubatz Fly

Simulium colombaschense

A historically devastating European black fly named after the Serbian town of Golubac. Larvae develop in the fast waters...

Diptera

Green Chironomid

Tanytarsus pallidicornis

A small greenish midge common in clean flowing water habitats. Larvae build portable silk tubes attached to stone surfac...

Diptera

Horn-faced Marsh Fly

Dictya umbrarum

A small yellowish marsh fly with patterned wings and prominent facial ridges. Larvae feed on decomposing aquatic snails ...

Diptera

Horse Fly

Tabanus bovinus

A large, stout fly with huge iridescent compound eyes that display rainbow patterns. Only females bite, using scissor-li...

Diptera

Inland Floodwater Mosquito

Aedes vexans

One of the most widespread and abundant mosquitoes globally, with a brownish body and narrow white bands on the hind tar...

Diptera

Latrine Fly

Fannia scalaris

A small fly that breeds in excrement and decaying organic matter in latrines and drains. It can cause urogenital myiasis...

Diptera

Log Miner Midge

Stenochironomus hilaris

A wood-mining chironomid whose larvae bore into submerged decaying logs in streams. Larvae create visible galleries bene...

Diptera

Long-legged Fly

Dolichopus ungulatus

A small, slender fly with a brilliant metallic green body and long, thin legs. Males have modified leg structures used i...

Diptera

Long-Palped Crane Fly

Dicranota bimaculata

A short-bodied crane fly whose predatory larvae inhabit gravel beds of clean streams. Larvae are active hunters among co...

Diptera

Long-tailed Dance Fly

Rhamphomyia longicauda

A small dark fly where females inflate their legs with air to appear larger during mating swarms. Males present nuptial ...

Diptera

Maculipennis Complex Mosquito

Anopheles maculipennis

A medium-sized mosquito that is the type species of a complex of at least eight sibling species across Europe and wester...

Diptera

Midge

Chironomus plumosus

A delicate, mosquito-like fly with feathery antennae that forms enormous mating swarms at dusk. Despite their appearance...

Diptera

Minimus Malaria Mosquito

Anopheles minimus

A small mosquito found along the foothills and valleys of Southeast Asia, breeding in slow-moving, clear streams. It has...

Diptera

Mountain Dance Fly

Empis pennipes

A predatory fly with feathery leg fringes used in aerial mating displays. Males offer prey gifts wrapped in silk to fema...

Diptera

New Zealand Sandfly

Austrosimulium ungulatum

A small black fly endemic to New Zealand that inflicts painful bites, particularly notorious in the South Island's West ...

Diptera

Onchocerciasis Black Fly

Simulium damnosum

The primary vector of river blindness in West and Central Africa. Larvae thrive in oxygen-rich rapids of tropical rivers...

Diptera

Ornate Soldier Fly

Odontomyia ornata

A medium-sized soldier fly with a green and black patterned abdomen and a somewhat flattened body. Adults are sluggish f...

Diptera

Orthoclad Stream Midge

Orthocladius oblidens

A small non-biting midge typical of cold running water habitats. Larvae build silk tubes on stone surfaces in stream rif...

Diptera

Pedician Crane Fly

Pedicia rivosa

A large, mottled-winged crane fly whose predatory larvae hunt invertebrates in wet mud and stream margins. Adults are of...

Diptera

Phantom Crane Fly

Bittacomorpha clavipes

A delicate fly with swollen black and white banded tarsi that acts as a tiny parachute, allowing it to float effortlessl...

Diptera

Phantom Midge

Chaoborus crystallinus

A nearly transparent midge whose larvae are planktonic predators in lakes. Larvae migrate vertically in the water column...

Diptera

Rain Fly

Haematopota crassicornis

A medium-sized cleg with mottled grey wings and iridescent green eyes. It is most active in humid overcast weather befor...

Diptera

River Midge

Rheotanytarsus exiguus

A small filter-feeding midge that builds silken nets on submerged stones in flowing water. Larvae are among the most abu...

Diptera

Sand Gnat

Culicoides furens

A very small biting midge commonly known as a no-see-um due to its near-invisible size. Despite being barely visible, it...

Diptera

Snail-killing Fly

Tetanocera elata

A wetland fly whose larvae are specialized predators or parasitoids of land snails. It has been investigated as a biocon...

Diptera

Soldier Fly

Odontomyia tigrina

A brightly colored soldier fly with aquatic larvae that filter-feed in ponds....

Diptera

Southern Long-legged Fly

Chrysotus gramineus

A tiny, brilliantly metallic green long-legged fly commonly found on vegetation near water. It runs rapidly across leaf ...

Diptera

Stalk-Eyed Fly

Teleopsis dalmanni

Males have eyes on the tips of long rigid stalks that can span wider than their body length. Females prefer males with w...

Diptera

Striped Deer Fly

Chrysops vittatus

A small deer fly with distinctive dark bands across its wings and bright green and gold patterned eyes. Females are pers...

Diptera

Subarctic Crane Fly

Prionocera turcica

A medium-sized crane fly with distinctive patterned wings and long, slender legs. Larvae develop in wet peatland soils. ...

Diptera

Tanypod Predatory Midge

Tanypus punctipennis

A predatory midge whose larvae hunt other small invertebrates in soft sediments. Adults have distinctively spotted wings...

Diptera

Tapered Drone Fly

Eristalis pertinax

A large hoverfly resembling a honeybee but distinguished by its yellow-tipped front tarsi. It is active from early sprin...

Diptera

Thyridanthrax Bee Fly

Thyridanthrax fenestratus

A bee fly with distinctive clear 'windows' in otherwise dark wings, found in sandy habitats across southern Europe. Larv...

Diptera

Tiger Hoverfly

Helophilus pendulus

A distinctive hoverfly with bold yellow and black stripes on the thorax. It breeds in muddy, organically enriched water....

Diptera

Tsetse Fly (Forest)

Glossina palpalis

A major vector of African trypanosomiasis (sleeping sickness). Unique among flies for giving live birth to a single larg...

Diptera

Twin-lobed Deer Fly

Chrysops relictus

A golden-green eyed deer fly with distinctive dark wing markings. It breeds in peaty wetlands and bogs across northern r...

Diptera

Western Encephalitis Mosquito

Culex tarsalis

A medium-sized mosquito with a distinctive white band on the proboscis and banded legs. It is the most important vector ...

Diptera

White-Stockinged Black Fly

Simulium vittatum

A widespread black fly species complex with distinctive white-banded legs. Larvae colonize almost any flowing water from...

Diptera

Yellow-legged Dance Fly

Empis livida

A medium-sized dance fly with yellowish legs, a grayish body, and a distinctive long proboscis. It forms conspicuous mat...

Ephemeroptera

American Sand Mayfly

Dolania americana

Holds the record for the shortest adult lifespan of any insect — females live less than five minutes as adults, just lon...

Ephemeroptera

Angler's Curse Mayfly

Caenis rivulorum

A tiny mayfly nicknamed for frustrating anglers who cannot imitate it on hook. Nymphs burrow in fine sediments of slow r...