Rivers & Streams
351 species found in this habitat
Abedus Giant Water Bug
Abedus herberti
A medium-sized, broad-bodied giant water bug found in streams and springs of the American Southwest. Males are well know...
African Bombardier Beetle
Stenaptinus insignis
A large, brightly colored bombardier beetle found across sub-Saharan Africa. Its yellow and dark-blue markings serve as ...
African Fig Wasp
Ceratosolen capensis
A tiny wasp with an obligate mutualistic relationship with African fig trees. Females enter figs through a narrow openin...
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...
African Horse Fly
Tabanus biguttatus
A large tropical horse fly that transmits animal trypanosomiasis in Africa. It is an important veterinary pest across su...
African Malaria Mosquito
Anopheles funestus
A major malaria vector in sub-Saharan Africa whose larvae develop in slow-moving stream margins. Prefers shaded, vegetat...
African Map Butterfly
Cyrestis camillus
A delicate white butterfly with fine dark lines across its wings resembling a map or circuit board. It rests with wings ...
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...
Alder Cimbicid Sawfly
Cimbex americanus
The largest sawfly in North America, with a robust body up to 25 mm long, clubbed antennae, and smoky brown wings. Body ...
American Grannom
Brachycentrus americanus
A case-building caddisfly whose larvae attach their cases to rocks in fast current and filter-feed. Cases are chimney-sh...
American Needlefly
Leuctra tenuis
A delicate needle-thin stonefly of Appalachian headwater streams. Nymphs are important processors of autumn-shed leaf li...
American Rubyspot
Hetaerina americana
A graceful damselfly with brilliant ruby-red patches at the base of the wings in males. Its metallic red-bronze body gle...
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...
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...
Anna's Eighty-Eight
Diaethria anna
A small neotropical butterfly with bright blue-green upper wings and a striking black-and-white numeral pattern undernea...
Appalachian Springfly
Remenus bilobatus
A rare springfly restricted to a few clean Appalachian headwater streams. Nymphs are predatory on small invertebrates am...
Apple Caddis
Brachycentrus appalachia
A caddisfly of Appalachian streams that builds tapered square cases from plant material. Larvae orient their cases facin...
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...
Aquatic Pygmy Grasshopper
Scelimena producta
A remarkable semi-aquatic pygmy grasshopper with paddle-like hind legs used for swimming. It dives and swims underwater ...
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...
Asian Clubtail
Asiagomphus melaenops
A medium-sized clubtail dragonfly found in clean streams across East Asia. Males have distinctive yellow and black body ...
Australian Emerald
Hemicordulia australiae
A metallic green-eyed dragonfly common near ponds and slow streams across Australia. It hovers sentrylike over water, ea...
Australian Giant Mayfly
Atalophlebia australis
One of the largest Australian mayflies, found in clean streams of southeastern Australia. Nymphs have feathery gills alo...
Australian Mole Cricket
Gryllotalpa pluvialis
A native Australian mole cricket that emerges from the soil in large numbers after heavy rains. It is attracted to light...
Banded Blackfly
Simulium ornatum
A widespread European black fly species complex found in diverse stream types. Larvae filter-feed from silken pads attac...
Banded Demoiselle
Calopteryx splendens
A striking damselfly with metallic blue-green body and distinctive dark wing patches in males. It frequents slow-flowing...
Beautiful Demoiselle
Calopteryx virgo
A stunning damselfly with entirely dark-tinted wings in males and bronze-green wings in females. It prefers faster-flowi...
Bee-fly Strepsipteran
Stylops ater
A dark-bodied strepsipteran that parasitizes Andrena mining bees in Europe. The triungulins actively seek out host bee l...
Bhutan Glory
Bhutanitis lidderdalii
A spectacular swallowtail from the eastern Himalayas with multiple tail streamers and intricate black, white, and red wi...
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...
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...
Bizarre Caddisfly
Lepidostoma togatum
A North American case-building caddisfly with square-sectioned cases made of leaf bits. Adults have a distinctive hairy ...
Black Mayfly
Ephemera danica var. nigra
A dark color variant of the common Green Drake mayfly found in some European populations. The dark form is more prevalen...
Black Sedge
Silo nigricornis
A caddisfly whose larvae build heavy cases from sand grains cemented with silk. Found in clean, stony streams. Cases hav...
Black-shouldered Spinyleg
Dromogomphus spinosus
A large, elegant clubtail with distinctive spiny hind legs and black shoulder stripes. It perches conspicuously on rocks...
Black-winged Damselfly
Calopteryx atrata
A large damselfly where males have entirely black iridescent wings with a metallic blue-green body. Females have dark sm...
Blandford Fly
Simulium posticatum
A notorious black fly that causes severe allergic reactions with its bite around the Blandford area of Dorset. Females n...
Blue Doctor Butterfly
Rhetus periander
A large metalmark butterfly with brilliant metallic blue upperwings and distinctive red-spotted underwings with long tai...
Blue Flea Beetle
Altica lythri
A small metallic blue-green flea beetle that feeds on willowherb and evening primrose. Has enlarged hind femora enabling...
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....
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...
Blue Quill
Paraleptophlebia guttata
A delicate spring-emerging mayfly with bluish-gray body coloring. Nymphs prefer riffles with abundant leaf detritus in c...
Blue-fronted Dancer
Argia apicalis
A robust damselfly with vivid blue coloring found in eastern North America. It prefers streams and rivers rather than st...
Blue-Winged Olive
Baetis tricaudatus
A small olive-colored mayfly with distinctive bluish-gray wings, abundant in clean streams across North America. It prod...
Blue-winged Olive Mayfly
Serratella ignita
A common mayfly of clean rivers and streams with distinctive blue-grey wings. One of the most important mayflies for fly...
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...
Borneo Firefly
Pteroptyx bearni
A synchronous firefly endemic to Borneo that creates dramatic light displays in riverside trees. It congregates in speci...
Borneo River Cruiser
Macromia cingulata
A large fast-flying dragonfly of pristine river systems in Borneo. It patrols long stretches of river with a distinctive...
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 ...
Brazilian Antlion
Myrmeleon brasiliensis
A common South American antlion found in sandy cerrado and caatinga habitats. Its larval pit traps dot the sandy floors ...
Broad-faced Sweat Bee
Lasioglossum platycephalum
A rare and distinctive European furrow bee with an unusually broad, flattened head. It nests in sandy or gravelly soils ...
Brown Drake Mayfly
Ephemera simulans
A large brownish mayfly with mottled wings that produces dramatic evening hatches on trout streams. Nymphs burrow in san...
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...
Brushleg Mayfly
Isonychia bicolor
A large, fast-swimming mayfly with forelegs fringed with bristles for filter feeding. Nymphs inhabit swift riffles of la...
Caenis Mayfly
Caenis horaria
One of the smallest mayflies, often called the 'angler's curse' because trout feed on them selectively. Larvae inhabit s...
Cahill Mayfly
Stenacron interpunctatum
A cream-to-tan colored mayfly found throughout eastern North America. It is named after the classic Light Cahill fly fis...
Camberwell Beauty
Nymphalis antiopa
A large, velvety maroon butterfly with a broad creamy-yellow wing border and a row of blue spots. It is a rare migrant t...
Cascades Stonefly
Doroneuria theodora
A large predatory stonefly endemic to Cascade Range streams. Nymphs inhabit cold boulder-strewn torrents at moderate ele...
Chinese Antlion
Euroleon sinicus
An East Asian antlion found in sandy habitats across China and neighboring countries. Its larvae construct pit traps in ...
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...
Chinese Dobsonfly
Neoneuromus ignobilis
A large dark-colored dobsonfly found in streams across China and Southeast Asia. It is less well known than its North Am...
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 ...
Chocolate-tip Moth
Clostera curtula
A small greyish moth with a rich chocolate-brown patch at the tip of each forewing. It rests with its wings wrapped tigh...
Cinnamon Caddis
Ceratopsyche morosa
A medium-sized net-spinning caddisfly with warm cinnamon-brown wings. Larvae build intricate silk capture nets in fast r...
Claassenia Stonefly
Claassenia sabulosa
A large predatory stonefly with a mottled yellow and brown pattern. The nymphs are active nocturnal hunters that roam th...
Clarke's Mining Bee
Andrena clarkella
An early spring bee with females covered in bright orange-red fur. It is closely associated with willow catkins for poll...
Clubtail Dragonfly
Ophiogomphus cecilia
A green-eyed dragonfly with a club-shaped abdomen tip found along clean rivers....
Cobra Clubtail
Gomphus vastus
A large North American clubtail with a dramatically flared abdomen tip and bold yellow markings. It patrols large rivers...
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 ...
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...
Common Clubtail
Gomphus vulgatissimus
A medium-sized dragonfly with a club-shaped abdomen tip and distinctive yellow and black markings. It emerges en masse f...
Common Cruiser
Vindula erota
A large and striking butterfly with warm orange-brown wings marked with black lines and white spots. Males are more brig...
Common Mayfly
Ephemera danica
Adults have no functional mouths and live only 1-3 days. Massive synchronized emergences called "hatches" are among natu...
Common Pond Skater
Aquarius najas
A large, elongate water strider that glides across the surface of flowing rivers and large ponds. It is one of the bigge...
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...
Common Water Strider
Aquarius remigis
A slender dark brown insect that skates across the surface of streams and ponds using water surface tension. Its long mi...
Common Windmill
Byasa polyeuctes
A black swallowtail with red body spots and white-patched hindwings that flutter in a distinctive windmill pattern. It f...
Convolvulus Hawk-moth
Agrius convolvuli
A powerful migrant hawk-moth with a streamlined grey body and pink-banded abdomen. It possesses an extraordinarily long ...
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...
Cottonwood Stag Beetle
Lucanus mazama
A medium-sized North American stag beetle found near river bottoms. Males have moderately large mandibles....
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...
Cretan Tiger Moth
Euplagia quadripunctaria rhodosensis
A colorful tiger moth found on Mediterranean islands including Crete and Rhodes. It has black-and-white striped forewing...
Cruiser Butterfly
Vindula dejone
A large butterfly with warm orange wings marked with black spots and lines. Males are bright tawny-orange while females ...
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 ...
Dark Blue Quill
Paraleptophlebia mollis
A small dusky-winged mayfly of Appalachian headwater streams. Nymphs are slow crawlers among leaf debris in gentle curre...
Dark Hendrickson Mayfly
Leptophlebia cupida
A dark-bodied spring mayfly important to trout anglers in the Northeast. Nymphs inhabit leaf packs and debris in slow to...
Demoiselle
Calopteryx haemorrhoidalis
A Mediterranean damselfly with deeply pigmented wings and metallic body coloration....
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...
Dobsonfly
Corydalus cornutus
Large insects with intimidating mandibles in males that are actually too large to bite effectively. Aquatic hellgrammite...
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...
Dragon Swallowtail
Sericinus montela
A delicate white swallowtail with black veins and red spots, bearing long spatulate tails. It has a weak fluttering flig...
Dragonhunter
Hagenius brevistylus
The largest clubtail in North America and a formidable aerial predator. Its massive size and bold black and yellow marki...
Eastern Salmonfly
Pteronarcys biloba
A large dark stonefly of Appalachian streams that emerges in late spring. Nymphs process leaf litter and are important d...
Eastern Tiger Swallowtail
Papilio glaucus
A large yellow butterfly with bold black tiger stripes and blue and orange markings on the hindwing margins. Females can...
Eastern Weighted Casemaker
Goera stylata
A caddisfly of clean European streams that builds mineral cases with large lateral ballast stones. Larvae scrape algae f...
Ebony Jewelwing
Calopteryx maculata
A stunning damselfly with entirely jet-black wings (males) or smoky wings with white spots (females). Males perform a co...
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...
Elephant Hawk-moth
Deilephila elpenor
A stunning pink and olive-green moth that hovers at flowers like a hummingbird at dusk. Its caterpillar has eyespots and...
Ellipes Pygmy Mole Cricket
Ellipes minuta
One of the smallest orthopterans in the world, barely visible to the naked eye. It lives in moist sand and mud along tro...
Elongate Paederine
Lathrobium elongatum
A very slender, reddish-brown paederine rove beetle that lives deep within waterlogged soils near streams. Its extremely...
Embossed Stonefly
Paragnetina immarginata
A large patterned stonefly of clean eastern streams with raised body markings. Nymphs are top predators among stream cob...
Emerald-spotted Flatwing Damselfly
Phaon iridipennis
A stunning damselfly with metallic green and blue body and broad, iridescent wings with emerald spots. Males display by ...
European Oil Bee
Macropis europaea
One of only two Northern Hemisphere bees that collect floral oils instead of nectar as a food provision. It collects oil...
Eyed Hawk-moth
Smerinthus ocellatus
A large hawk-moth with cryptic brown forewings that conceal vivid blue and black eyespots on the hindwings. When startle...
Fatal Metalmark
Calephelis nemesis
A tiny dark brown butterfly with fine metallic silver lines across the wings and minute checkered fringes. Despite its o...
Figwort Weevil
Cionus scrophulariae
A globular weevil with checkerboard black and white patterning found on figwort and mullein. Larvae feed externally on l...
Finger-net Caddisfly
Philopotamus montanus
A medium caddisfly with golden-brown wings. Larvae spin finger-shaped silken nets in fast-flowing water to capture ultra...
Five-bar Swordtail
Graphium antiphates
An elegant swallowtail with pale creamy-white wings crossed by bold black zebra-like stripes and exceptionally long, nar...
Flat-headed Mayfly
Epeorus assimilis
A stream-dwelling mayfly nymph with a flattened body for clinging to rocks in rapids....
Forest Demoiselle
Calopteryx syriaca
A Near Eastern demoiselle found along streams in the Levant region. Males have dark wings with blue-green metallic body ...
Freyer's Purple Emperor
Apatura metis
A large, powerful butterfly closely related to the purple emperor but restricted to river valleys. Males display a brill...
Fulvus Driver Ant
Dorylus fulvus
A predominantly subterranean driver ant species with yellowish-brown coloration. Unlike some congeners, it rarely forms ...
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...
Giant Amazonian Cricket
Brachytrupes megacephalus
A large burrowing cricket with a disproportionately large head and powerful mandibles used for excavating deep soil burr...
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 ...
Giant Dobsonfly
Acanthacorydalis fruhstorferi
The largest aquatic insect in the world by wingspan, found in streams in Vietnam and China. Males have enormous mandible...
Giant Lacewing
Polystoechotes punctata
Once widespread across North America, it vanished from the eastern US by the 1950s. A single specimen was rediscovered i...
Giant Michigan Mayfly
Hexagenia bilineata
A large burrowing mayfly with two dark stripes on its thorax. Nymphs dig into soft clay and silt bottoms of large rivers...
Giant Stonefly
Pteronarcys californica
Large aquatic insects whose nymphs require pristine, cold, oxygen-rich streams. Adults are poor fliers and stay near wat...
Giant Swallowtail of the Andes
Papilio thoas
One of the largest swallowtail butterflies in South America, with bold yellow and black striped wings and long tail stre...
Giant Water Strider
Gigantometra gigas
The largest water strider in the world, found in Southeast Asian streams. Its leg span can reach over 25 cm across the w...
Glacier Midge
Diamesa steinboecki
A remarkable midge that completes its entire life cycle in glacial streams at temperatures near 0C. Represents one of th...
Golden Stonefly
Calineuria californica
A large predatory stonefly with a golden-brown body found in western North American rivers. Its nymphs are active hunter...
Golden-Ringed Dragonfly
Cordulegaster boltonii
The longest dragonfly in Britain, adorned with bold black and yellow rings along its body. Females have a conspicuous ov...
Golubatz Fly
Simulium colombaschense
A historically devastating European black fly named after the Serbian town of Golubac. Larvae develop in the fast waters...
Graceful Winter Stonefly
Capnia gracilaria
A minute stonefly of cold North American headwater streams emerging in winter. Females are often short-winged or wingles...
Grannom Caddisfly
Brachycentrus subnubilus
A small dark caddisfly that produces massive spring hatches on European rivers. Larvae build distinctive square-sectione...
Granulated Pygmy Grasshopper
Tetrix arenosa
A granular-textured pygmy grasshopper found on sandy and gravelly substrates in North America. Its rough body surface en...
Great Helen
Papilio iswara
A large, elegant swallowtail with dark velvety black wings bearing a broad white band across the hindwings and blue subm...
Great Nawab
Polyura eudamippus
A large and powerful butterfly with pale green-white uppersides and richly marked brown and olive undersides. The hindwi...
Great Red Sedge
Phryganea striata
A large cinnamon-colored caddisfly with distinctive striped wings, well known to European anglers. It hatches in early s...
Green Alder Sawfly
Monsoma pulveratum
A pale green sawfly that blends well with alder foliage. Larvae are translucent green and feed on the undersides of alde...
Green Dragontail
Lamproptera meges
A diminutive swallowtail butterfly with translucent green-tinted wings and extraordinarily long, slender tail streamers ...
Green Drake Mayfly
Ephemera guttulata
A large and strikingly beautiful mayfly with mottled wings that emerges in late spring. Its hatches on eastern North Ame...
Green Sedge
Rhyacophila dorsalis
A free-living caddisfly larva that does not build a case, instead roaming the streambed as an active predator. Adults ha...
Green-banded Swallowtail
Papilio nireus
A striking black swallowtail with brilliant metallic blue-green bands across both wings. It is a fast flier often seen m...
Green-eyed Hooktail
Paragomphus genei
An African clubtail with bright green eyes and hooked male appendages. It is found along rivers and streams throughout s...
Hairy Whirligig Beetle
Orectochilus villosus
A nocturnal whirligig beetle covered in fine golden hairs that trap air underwater. Unlike other whirligigs it hides und...
Harvester Butterfly
Feniseca tarquinius
The only carnivorous butterfly in North America, whose caterpillar feeds on woolly aphids rather than plants. Adults are...
Hellgrammite
Nigronia serricornis
A dark-colored dobsonfly whose larvae, known as hellgrammites, are prized as fishing bait. Adults are smaller than Coryd...
Hooked Stonefly
Agnetina capitata
A large, patterned stonefly of eastern North American rivers with distinctive hooked anal gills. Nymphs are active noctu...
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...
Hornet Moth
Sesia apiformis
A clearwing moth that is a near-perfect mimic of the European hornet....
Indian Antlion
Myrmecaelurus trigrammus
A medium-sized antlion widespread across southern Asia and the Middle East. Often encountered in sandy soils near human ...
Indian Dobsonfly
Nevromus testaceus
A medium-sized dobsonfly found in hill streams of the Indian subcontinent. Larvae live under rocks in well-oxygenated ra...
Indian Olive Mayfly
Baetis conservatus
A small olive-colored mayfly found in Himalayan streams and foothill rivers. Nymphs are agile swimmers adapted to modera...
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...
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...
Iron Blue Dun
Baetis muticus
A small dark mayfly that hatches prolifically on cool overcast days. Nymphs are found clinging to stones in moderate to ...
Japanese Alderfly
Sialis japonica
A medium-sized alderfly found in ponds and slow streams across Japan. It is one of the most common megalopterans in East...
Japanese Antlion
Hagenomyia micans
A large East Asian antlion with glossy wings and a robust body. A familiar summer insect across Japan attracted to artif...
Japanese Burrowing Mayfly
Ephemera japonica
A large burrowing mayfly native to Japanese rivers and streams. It emerges in large numbers during early summer evenings...
Japanese Dobsonfly
Protohermes grandis
A large aquatic insect known as 'hebi-tonbo' (snake dragonfly) in Japanese. The adult males have elongated, curved mandi...
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...
Japanese Katydid
Gampsocleis buergeri
A large green katydid with a robust body and powerful jaws found across Japan. Its loud evening chirping song is one of ...
Japanese Lunar Moth
Actias aliena
A beautiful pale green moon moth found in Japan, known as 'o-mizuao.' Features long, elegant tail streamers on the hindw...
Japanese Mole Cricket
Gryllotalpa fossor
A mole cricket native to Japan and Korea that inhabits moist soils near rivers and paddies. It is declining in some area...
Japanese Tiger Beetle
Cicindela japonica
A common and widespread tiger beetle across Japan with variable coloring from green to coppery brown. It frequents sunny...
Julia Skimmer
Orthetrum julia
A slender African dragonfly where mature males develop a striking black and white pattern. It is found throughout sub-Sa...
Keeled Skimmer
Orthetrum coerulescens
A slender dragonfly where mature males develop a powder-blue abdomen. Females and immature males are yellowish-brown. It...
Kirby's Dropwing
Trithemis kirbyi
A bright orange-red dragonfly widespread across Africa and into southern Asia. Males have distinctive orange wing bases ...
Kosovo Caddisfly
Tinodes lumbardhi
A caddisfly species new to science described in 2025 from the Lumbardhi i Decanit River in Kosovo. Its discovery highlig...
Labrador Minnow Mayfly
Baetis labradoriensis
A small mayfly found in cold northern streams with rapid currents. Nymphs cling to submerged stones and feed on periphyt...
Large Alderfly
Sialis nigripes
A relatively large alderfly with dark wings and black legs found near rivers in eastern North America. Adults rest on st...
Large Cinnamon Sedge
Potamophylax latipennis
A large, robust caddisfly with broad cinnamon-colored wings found across Europe. Larvae build heavy stone cases in cool ...
Large Dark Olive Mayfly
Baetis rhodani
The most common European mayfly, emerging year-round in many rivers. It is a small olive-brown species that serves as a ...
Large Elm Beetle
Oulimnius tuberculatus
A small, robust riffle beetle found throughout European streams. Adults have a distinctive tuberculate surface texture o...
Large Spring Stonefly
Dinocras cephalotes
One of the largest European stoneflies with a distinctively broad, flattened head. Nymphs are apex invertebrate predator...
Large Stonefly
Perla bipunctata
One of the largest European stoneflies with a distinctive pair of pale spots on its head. Its predatory nymphs live amon...
Large Whirligig Beetle
Dineutus americanus
The largest North American whirligig beetle, found on the surface of streams and rivers. It produces defensive chemicals...
Lepidostoma Leaf Caddis
Lepidostoma quercinum
A caddisfly named for its association with oak-leaf-rich streams. Larvae build tidy rectangular cases from leaf squares....
Lesser Purple Emperor
Apatura ilia
Similar to the Purple Emperor but smaller, with an ocellus on the forewing and more strongly marked underside. It occurs...
Light Cahill Mayfly
Heptagenia solitaria
A pale-colored mayfly highly prized by fly fishers for imitating hatches. Nymphs prefer moderate current over gravel sub...
Limnephiloid Snail Caddis
Helicopsyche limnella
A tiny caddisfly that builds a perfectly spiraled case from fine sand grains cemented with silk. Larvae scrape algae fro...
Little Black Caddis
Chimarra obscura
A small, dark caddisfly that builds finger-shaped silk nets in stream crevices. It is widespread in warm-water streams a...
Little Olive Sedge
Hydropsyche betteni
A common North American net-spinning caddisfly tolerant of a range of water qualities. Larvae build intricate filtering ...
Little Sister Sedge
Cheumatopsyche campyla
A small net-spinning caddisfly widespread in warm-water streams. Larvae tolerate moderate enrichment better than most Hy...
Little Tan Short-Horn Sedge
Glossosoma nigrior
A small, abundant caddisfly of eastern North American streams. Larvae build tortoise-shell-shaped cases of fine gravel a...
Log Miner Midge
Stenochironomus hilaris
A wood-mining chironomid whose larvae bore into submerged decaying logs in streams. Larvae create visible galleries bene...
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...
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...
Long-Tailed Mayfly
Palingenia longicauda
The largest European mayfly with body and cerci reaching over 120 mm. Its spectacular mass hatches on the Tisza River ar...
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...
Loricera Bristly Ground Beetle
Loricera pilicornis
A small, distinctive ground beetle with uniquely modified antennae bearing long bristles. These bristle-fringed antennae...
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...
Lunar Hornet Moth
Sesia bembeciformis
A large clearwing moth that mimics a hornet and bores into willow and sallow trunks. Adults emerge in midsummer and are ...
Madagascan Moon Moth
Argema mittrei male form
The male form has exceptionally long tail streamers that can exceed 15 cm. These tails spin in flight, confusing bat ech...
Mahogany Dun
Isonychia harperi
A large reddish-brown mayfly with impressive filter-feeding forelegs. Nymphs prefer moderate to fast riffles with clean ...
Malabar Banded Peacock
Papilio buddha
A striking swallowtail endemic to the Western Ghats with broad green bands across dark wings. Males congregate at mud pu...
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...
Malagasy Dobsonfly
Neochauliodes madagascariensis
A large, brown-winged insect with broad wings held tent-like over the body at rest. Males may have elongated mandibles. ...
Malagasy Flatwing
Platycnemis malgassica
A slender damselfly with expanded white tibiae on the middle and hind legs, used in courtship displays. Males have a pal...
Malaysian Firefly
Pteroptyx valida
A synchronous firefly of Malaysian rivers that creates spectacular congregation displays. It is a key species for firefl...
Map Butterfly
Araschnia levana
A small butterfly that produces two dramatically different seasonal forms within the same year. Spring adults are orange...
Marbled Sedge
Hydropsyche contubernalis
A net-spinning caddisfly with distinctly marbled wing patterns. It is common in larger European rivers and is tolerant o...
March Brown Mayfly
Rhithrogena germanica
A spring-emerging mayfly with a brownish body and two tails, historically important to European fly fishing. Its flat ny...
Mascarene Spreadwing
Lestes auripennis
A rare damselfly endemic to Mauritius and Reunion in the Mascarene Islands. It breeds in slow-flowing streams with overh...
Microcaddisfly
Hydroptila sparsa
One of the smallest caddisflies, with adults only 3-4 mm long. Larvae build tiny purse-shaped cases from silk and algae ...
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...
Mole Cricket
Gryllotalpa gryllotalpa
Extraordinary burrowers with powerful shovel-like forelegs adapted for digging. Males construct horn-shaped burrows that...
Moss Grasshopper
Batrachideinae sp. (Coscineuta coxalis)
A tiny pygmy grasshopper with an elongated pronotum covered in moss-like textures. It is practically invisible on moss-c...
Mother of Pearl Caddisfly
Mystacides azurea
A small iridescent caddisfly with long antennae and pearly blue-green wings. It swarms in large mating flights over lake...
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...
Narrow-bordered Bombardier
Brachinus sclopeta
A Mediterranean bombardier beetle with a narrow body and orange-brown coloring. It shelters communally under stones in d...
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...
Needle Stonefly
Leuctra fusca
A small slender stonefly that rolls its wings tightly around its body at rest, giving it a needle-like appearance. Commo...
Needlefly
Leuctra inermis
A slender stonefly that rolls its wings tightly around its body at rest, resembling a needle. Nymphs shred leaf litter i...
Neotropical Blue Hairstreak
Pseudolycaena marsyas
A brilliant iridescent blue hairstreak butterfly with delicate tail streamers on the hind wings. Its underside is pale g...
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....
Nettle-tree Butterfly
Libythea celtis
A medium butterfly with angular wings and an extremely long snout formed by elongated palps. Its wings are dark brown wi...
New Zealand Blue Damselfly
Austrolestes colensonis
New Zealand's most common damselfly, with striking blue and black colouration in males. It is found near ponds, lakes, a...
New Zealand Caddisfly
Olinga feredayi
A stony-cased caddisfly endemic to New Zealand streams. Larvae are important grazers found in virtually all clean New Ze...
New Zealand Mayfly
Deleatidium lillii
The most abundant and widespread mayfly genus in New Zealand. Nymphs dominate the invertebrate fauna of stony streams th...
New Zealand Peripatus
Peripatoides novaezealandiae
A velvet worm native to New Zealand, representing one of the most ancient terrestrial animal lineages. Although not an i...
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 ...
New Zealand Stonefly
Zelandoperla decorata
An endemic New Zealand stonefly found in clean, fast-flowing streams. The aquatic nymphs are important indicators of wat...
Nigerian Driver Ant
Dorylus nigricans
A large driver ant species with massive soldier caste bearing sickle-shaped mandibles. Raiding columns can stretch over ...
North American Alderfly
Sialis infumata
A small, dark-winged alderfly common near ponds and slow streams across eastern North America. Adults are clumsy fliers ...
North American Pygmy Mole Cricket
Neotridactylus apicialis
A minute mole cricket found on sandy shores of rivers and ponds in North America. It burrows just beneath the wet sand s...
Northern Stonefly
Nemoura arctica
A small, dark brown stonefly with two long cerci at the tip of the abdomen. Adults hold their wings flat over the body. ...
October Caddis
Dicosmoecus gilvipes
A large orange-bodied caddisfly that hatches in autumn on western North American rivers. It is one of the most important...
Ogasawara Damselfly
Rhinocypha ogasawarensis
A striking damselfly endemic to the Bonin (Ogasawara) Islands of Japan. Males display iridescent blue wing patches durin...
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...
Old Lady Moth
Mormo maura
A large, sombre dark-brown moth whose wing pattern was thought to resemble a shawl worn by elderly women. It hides in da...
Olive Drake Mayfly
Ephemera lineata
A large burrowing mayfly with distinctive mottled brown wings. Nymphs excavate U-shaped burrows in sandy stream bottoms....
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...
Orange-spotted Emerald
Oxygastra curtisii
A rare metallic green dragonfly with golden spots along its abdomen....
Oregon Tiger Beetle
Cicindela oregona
A variable-colored tiger beetle found in open sandy and gravelly habitats across western North America. Coloring ranges ...
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...
Pale Evening Dun
Heptagenia adaequata
A flat-bodied mayfly whose nymphs press tightly against rocks in swift currents. Adults emerge at dusk during summer mon...
Pale Morning Dun
Ephemerella excrucians
A small pale yellowish mayfly that hatches in large numbers on western North American streams during late spring. It is ...
Pale Triangle
Graphium eurypylus
A fast-flying swallowtail with pale blue-green triangle markings on black wings. It frequently puddles on wet sand and m...
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...
Pebble Prominent Moth
Notodonta ziczac
A grey-brown moth with a tuft of scales on the trailing edge of each forewing that creates a prominent bump. Its caterpi...
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...
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. ...
Perlodes Stonefly
Perlodes microcephalus
A striking patterned stonefly with yellow and brown markings found across Europe. Nymphs are active predators that emerg...
Pink Lady Mayfly
Epeorus vitreus
A pale pinkish mayfly of eastern North American streams with a distinctly two-tailed nymph. Adults have translucent wing...
Poplar Hawk-moth
Laothoe populi
A large grey-brown hawk-moth that holds its hindwings forward of the forewings at rest, creating an unusual silhouette. ...
Poplar Kitten Moth
Furcula bifida
A small relative of the puss moth with a caterpillar that also has tail whips....
Purple Dun
Paraleptophlebia adoptiva
A small dark mayfly with purplish-gray wings found in eastern streams. Nymphs crawl among submerged leaf packs in modera...
Puss Moth
Cerura vinula
A furry white moth whose caterpillar has whip-like tail filaments and sprays formic acid....
Pygmy Mole Cricket
Tridactylus variegatus
A tiny mole cricket that lives along sandy stream banks and lake margins. It has miniature digging forelegs and can jump...
Quill Gordon Mayfly
Epeorus pleuralis
A medium-sized flat-bodied mayfly that clings to rocks in fast Appalachian streams. It is one of the first major mayfly ...
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...
Rainbow Leaf Beetle
Chrysolina fastuosa
A metallic multicolored beetle with iridescent green, blue, and purple stripes....
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...
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...
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...
River Clubtail
Stylurus flavipes
A large clubtail dragonfly with yellow and black markings and a distinctly expanded abdomen tip. It breeds in large lowl...
River Jewelwing
Calopteryx aequabilis
A North American damselfly with narrow dark wing tips in males and a metallic green body. It prefers faster-flowing rive...
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...
Rock Caddisfly
Goera calcarata
A caddisfly of limestone streams whose cases incorporate calcareous sand grains and pebble ballast. Larvae scrape algae ...
Rolled-Wing Stonefly
Leuctra geniculata
A small autumn-emerging stonefly with wings rolled around the body. It is one of the few stoneflies that hatches in late...
Rosy Underwing
Catocala electa
A large moth with camouflaged grey-brown forewings hiding vivid rosy-pink and black hindwings. When disturbed, the flash...
Russet-tipped Clubtail
Stylurus plagiatus
A handsome clubtail with orange-brown wingtips and a distinctly widened club-shaped abdomen. It flies late in the season...
Rusty Sedge
Hydropsyche saxonica
A net-spinning caddisfly of clean upland European streams sensitive to organic pollution. Larvae construct fine-meshed c...
Saddle-Case Caddisfly
Glossosoma conformis
A small caddisfly whose larvae build distinctive saddle-shaped cases from tiny stones. When it pupates, it cuts the case...
Sallfly
Chloroperla tripunctata
A small, bright green stonefly with three distinctive dark spots on its head. It is common in clean European upland stre...
Sallow Kitten
Furcula furcula
A small, fluffy white moth with delicate grey markings. Named for its resemblance to a small cat. Larvae have tail filam...
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...
Sand Fly Caddis
Glossosoma intermedium
A small caddisfly whose larvae build distinctive tortoise-shell-shaped stone cases. They are important grazers on algae-...
Sand Martin Flea
Ceratophyllus styx
A flea species specific to sand martin colonies in their bank-nesting burrows. It can accumulate in large numbers in nes...
Sand-Case Caddisfly
Sericostoma personatum
A caddisfly whose larvae build smooth, curved cases entirely from fine sand grains cemented with silk. Adults are dark w...
Sapphire Jewelwing
Vestalis luctuosa
A large Southeast Asian damselfly with a dark metallic blue body and dark-tipped wings. Males shimmer with deep sapphire...
Satin Moth
Leucoma salicis
A pure white moth with a satin-like sheen and strikingly chequered black-and-white legs. It can become a serious defolia...
Scarce Chaser
Libellula fulva
A medium-sized dragonfly where mature males develop a powdery blue abdomen. It is associated with clean, slow-flowing ri...
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...
Scarlet Tiger Moth
Callimorpha dominula
A striking day-flying moth with black forewings spotted with white and yellow, and brilliant scarlet hindwings. It playe...
Seychelles Cascader
Zygonyx hookeri
A large dragonfly endemic to the Seychelles that breeds in fast-flowing streams and waterfalls. Adults hawk insects over...
Short-Tailed Stonefly
Brachyptera risi
A medium-sized early-emerging stonefly with notably short cerci. It hatches in late winter and early spring across Europ...
Silver-spotted Ghost Moth
Sthenopis argenteomaculatus
A large ghost moth from North America with silver-spotted wings. Caterpillars bore into the roots of alder trees, taking...
Silverhorn Caddisfly
Athripsodes cinereus
A delicate caddisfly with silvery-grey wings and very long antennae. It is common near lakes and slow rivers across Euro...
Sinuate-winged Damselfly
Tatocnemis sinuatipennis
An endemic damselfly with distinctively sinuate or wavy-edged wings, a feature unique among Malagasy odonates. Males hav...
Skimmer Stonefly
Acroneuria abnormis
A large predatory stonefly widespread in eastern North American rivers. Adults skim across the water surface during egg-...
Small Ballast Caddisfly
Silo pallipes
A small caddisfly that cements large pebbles to its mineral case for ballast in fast water. Found exclusively in clean c...
Small Goldenring
Cordulegaster trinacriae
A Mediterranean goldenring dragonfly found in Italy and nearby regions. It is smaller than most goldenrings and inhabits...
Small Rivulet
Perizoma alchemillata
A delicate small moth found in damp habitats where hemp agrimony grows. The larvae feed inside the flowers. Has subtle g...
Small Spurwing Mayfly
Centroptilum luteolum
A tiny, elegant mayfly with a distinctive spur on its hindwing. It is widespread in European streams and rivers with goo...
Small-headed Stonefly
Perlodes microcephala
A large spring-emerging stonefly found in clean upland rivers. Nymphs are predatory, feeding on mayfly and midge larvae....
Snail-Case Caddis
Helicopsyche borealis
A remarkable caddisfly whose larvae build coiled cases from sand grains that closely resemble tiny snail shells. It is w...
Snail-Case Caddisfly
Helicopsyche mexicana
A remarkable caddisfly whose larva builds a coiled sand-grain case resembling a tiny snail shell. Found in warm streams ...
Snowborn Stonefly
Capnia atra
A tiny black stonefly that emerges during the coldest months in northern North America. Adults are frequently observed w...
South African Brown Stonefly
Neoperla spio
A medium-sized brown stonefly found in rivers and streams of southern and eastern Africa. Nymphs are predatory and favor...
South African Dobsonfly
Taeniochauliodes ochraceus
A large dobsonfly from southern African rivers with broad amber-tinged wings....
South American Fire Ant
Solenopsis saevissima
An aggressive reddish-brown fire ant native to South America with a painful venomous sting. Colonies form conspicuous mo...
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 ...
South American Giant Mayfly
Campsurus major
A large tropical mayfly found in South American rivers and floodplains. Males have distinctive elongated forelegs used f...
Southern Salmonfly
Neoperla clymene
A medium-sized stonefly of warm southeastern streams with nocturnal adults. Nymphs are active predators in gravel substr...
Southern Skimmer
Orthetrum brunneum
A robust skimmer dragonfly where males develop a pale powder-blue pruinescence. Females are brown with a pale lateral st...
Sparkling Jewelwing
Calopteryx xanthostoma
A southwestern European demoiselle closely related to the Banded Demoiselle. Males have broad dark wing bands and a dist...
Speckled Peter Stonefly
Paragnetina media
A medium-sized patterned stonefly of eastern streams with distinctive speckled wing markings. Nymphs are voracious preda...
Spiny Crawler Mayfly
Ephemerella subvaria
A mayfly important to fly anglers and known as the Hendrickson in fishing culture....
Spotted Hydropsyche Caddisfly
Hydropsyche slossonae
A net-spinning caddisfly with tan to brown mottled wings. Larvae build intricate silken nets between rocks to capture dr...
Spotted Sedge
Hydropsyche siltalai
A net-spinning caddisfly that constructs silken capture nets in fast-flowing water to filter food from the current. Adul...
Spring Fishfly
Chauliodes rastricornis
A medium-sized fishfly with pectinate antennae found in eastern North America. Adults are attracted to lights near river...
Spring Stonefly
Amphinemura sulcicollis
A small dark stonefly that emerges in early spring in European streams. Nymphs are shredders of decomposing leaf litter ...
Springfly
Isoperla signata
A spring-emerging stonefly of fast-flowing European streams. Nymphs are active hunters that pursue prey among streambed ...
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...
Stinking Longhorn
Aromia moschata ambrosiaca
A subspecies of the musk beetle with even more intense metallic coloring and a slightly different fragrance....
Stream Jewelwing
Neurobasis chinensis
A spectacular tropical damselfly where males have iridescent metallic green hindwings that flash in sunlight. Females ha...
Striped Alder Sawfly
Hemichroa crocea
A brightly colored sawfly with an orange body and black markings on the thorax. Larvae are pale yellowish-green with dar...
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...
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...
Striped Hawkmoth
Hyles livornica
A streamlined hawk-moth with olive-brown forewings crossed by pale veins and pink-banded hindwings. It is a strong migra...
Stripetail Stonefly
Isoperla bilineata
A yellow-green stonefly with two distinctive dark stripes on its tails. It is common in clean North American streams dur...
Strong Casemaker Caddisfly
Odontocerum albicorne
A caddisfly that builds smooth, slightly curved sand-grain cases up to 20 mm long. Larvae inhabit cool, clean streams wi...
Sulphur Mayfly
Ephemerella dorothea
A small pale yellow mayfly that produces reliable evening hatches on eastern North American streams. One of the most imp...
Summer Fishfly
Chauliodes pectinicornis
A medium-sized fishfly emerging in summer with distinctive dark-veined wings and feathery antennae. Larvae develop in mu...
Superb Jewelwing
Calopteryx amata
An East Asian damselfly with iridescent metallic green body and dark wings with blue-purple reflections. It inhabits cle...
Swamp Darner
Austroaeschna parvistigma
A medium-sized brown and blue darner dragonfly found along shaded creeks in southeastern Australia. It has small stigmat...
Tan Spotted Sedge
Hydropsyche instabilis
A medium-sized caddisfly whose larvae construct net retreats in fast-flowing upland streams. Adults are tan with spotted...
Tansy Beetle
Chrysolina graminis
A stunning metallic green and copper beetle covered in tiny pits. It is one of the rarest beetles in Britain....
Tawny Emperor
Asterocampa clyton
A warm tawny-brown butterfly with dark bars and a row of small eyespots on the hindwing. Unlike most butterflies, it rar...
Thyridanthrax Bee Fly
Thyridanthrax fenestratus
A bee fly with distinctive clear 'windows' in otherwise dark wings, found in sandy habitats across southern Europe. Larv...
Tiny Winter Black Stonefly
Capnia nigra
A tiny black stonefly that emerges in late winter across European streams. It is among the earliest insects to appear ea...
Toad Bug
Gelastocoris oculatus
A warty bug that closely resembles a tiny toad and hops along stream banks....
Trico Mayfly
Tricorythodes stygiatus
A tiny mayfly that forms enormous morning spinner falls over calm streams and rivers. Males have distinctive white bodie...
Triplaris Ant
Pseudomyrmex triplarinus
A South American ant that inhabits the hollow stems of Triplaris trees in a mutualistic relationship. Workers swarm out ...
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 ...
Trumpet-Net Caddis
Polycentropus flavomaculatus
A caddisfly whose larvae spin trumpet-shaped silk nets to trap prey. It is common throughout European rivers and lakes....
Tsetse Fly (Forest)
Glossina palpalis
A major vector of African trypanosomiasis (sleeping sickness). Unique among flies for giving live birth to a single larg...
Tube-Making Caddis
Psychomyia flavida
A small caddisfly whose larvae build silken tubes cemented to rock surfaces in rivers. The tubes create a network of gal...
Twin-spotted Spiketail
Cordulegaster maculata
A large, dark brown spiketail with paired yellow spots on each abdominal segment. It is the most common spiketail in eas...
Two-spotted Grouse Locust
Paratettix mexicanus
A tiny pygmy grasshopper commonly found at the muddy margins of ponds and streams across the Americas. It often has two ...
Vampire Moth
Calyptra thalictri
A dull grey-brown moth with a uniquely evolved proboscis capable of piercing mammalian skin. Males occasionally drink bl...
Velvet Ameletid Mayfly
Ameletus velox
A swift-swimming mayfly of headwater streams known for its velvety-textured nymphal cuticle. Adults emerge in early summ...
Violet Copper
Lycaena helle
A tiny butterfly whose males display a vivid violet-purple sheen over coppery-orange wings. It is one of Europe's rarest...
Weighted Casemaker
Goera pilosa
A caddisfly that attaches heavy ballast stones to the sides of its case for stability. Larvae are found in fast-flowing ...
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...
Western Fishfly
Neohermes filicornis
A western North American fishfly with feathery antennae and brownish wings. Adults are attracted to lights near streams ...
Western Grannom Caddis
Brachycentrus occidentalis
A widespread European caddisfly forming mass emergences in spring on alkaline rivers. Larvae build four-sided tapering c...
Western Iron Dun
Epeorus longimanus
An iconic eastern mayfly that signals the start of spring fly-fishing season. Nymphs have only two tails and cling to ro...
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...
Whirligig Diving Beetle
Macrogyrus oblongus
A large whirligig beetle that spins on the water surface of African rivers....
White Miller Mayfly
Ephoron virgo
A white-bodied European mayfly that emerges in enormous synchronized swarms at dusk. Females are unique among mayflies i...
White-Gloved Howdy
Isonychia sadleri
Named for the white tips of its forelegs resembling gloves. Nymphs are powerful swimmers found in fast-flowing Appalachi...
White-legged Damselfly
Platycnemis pennipes
A pale, delicate damselfly with distinctively flattened white legs that the male waves during courtship displays. It pre...
White-Stockinged Black Fly
Simulium vittatum
A widespread black fly species complex with distinctive white-banded legs. Larvae colonize almost any flowing water from...
Willow Leafhopper
Idiocerus lituratus
A medium-sized leafhopper found on willow trees. Males produce vibrational signals transmitted through the plant to attr...
Willowherb Hawk Moth
Proserpinus proserpina
A compact hawk moth with olive-green forewings and bright orange hindwings with a dark border. It flies at dusk and is f...
Winter Stonefly
Taeniopteryx burksi
A dark-colored stonefly that emerges during winter months when few other aquatic insects are active. Adults can be found...
Woolly Alder Sawfly
Eriocampa ovata
A small, dark sawfly whose larvae are covered in a white, woolly, waxy secretion. The larvae feed on the underside of al...
Xya Pygmy Mole Cricket
Xya pfaendleri
A minute European pygmy mole cricket typically found on bare sandy ground near rivers. It is so small it is often confus...
Yellow Drake Mayfly
Ephemera lutea
One of the largest mayflies in eastern North America with a pale greenish body. Nymphs live in burrows in the silty bott...
Yellow May Dun
Heptagenia sulphurea
A bright sulfur-yellow mayfly common across European rivers during early summer. Its flat nymphs are adapted to fast-flo...
Yellow Sally
Isoperla fulva
A bright yellow stonefly common in European upland streams. Nymphs are omnivorous, feeding on both algae and small inver...
Yellow Sally Stonefly
Isoperla grammatica
A common European stonefly with a distinctive yellow body, emerging in late spring on clean rivers. It is a well-known s...
Yellow Stonefly
Isoperla dicala
A bright yellow springfly found in clean Appalachian streams. Nymphs are predatory on small invertebrates in gravel subs...
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...
Zebra Caddis
Macrostemum zebratum
A strikingly patterned net-spinning caddisfly of eastern North American rivers. Larvae build large silken capture nets i...