Bug Encyclopedia
Search and identify bugs & insects — beetles, butterflies, moths, ants, bees, spiders and more — with size, habitat, danger, behavior, and how to tell them apart.
Toe-Biter
One of the largest true bugs in the world, the toe-biter is a broad, flattened ambush predator that lies in wait among pond vegetation, seizing prey many times its own size with powerful raptorial front legs.
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Question Mark Butterfly
A ragged-edged anglewing butterfly named for the tiny silver question-mark squiggle on its mottled brown underside, with tawny-orange upperwings dotted in black.
butterflyQuestion Mark Caterpillar
A spiny, variably colored caterpillar named for the silver question-mark-shaped mark on the underside of the adult butterfly's wings.
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Stinging Rose Caterpillar
A boldly striped slug caterpillar in candy-like tones of yellow, orange, and purple, crowned with tufted spine clusters that can sting on contact.
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Stink Bug
A broad, shield-shaped true bug that releases a pungent defensive odor when handled or crushed, commonly found on garden vegetables and fruit trees.
true-bugDobsonfly Larva (Hellgrammite)
A large, fierce-looking aquatic larva with strong pinching jaws and fringed side gills, spending years hunting under stream rocks before becoming a giant winged dobsonfly.
aquatic-insectRough Stink Bug
A gray-brown, textured stink bug with an irregular, jagged-edged outline that blends seamlessly against tree bark, making it one of the best-camouflaged members of its family.
true-bugPredatory Stink Bug
Unlike its plant-feeding relatives, the predatory stink bug is a hunter that spears caterpillars and beetle larvae with a stout beak. The spined soldier bug is a familiar shield-shaped garden ally.
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Green Stink Bug
A broad, shield-shaped bug in solid bright green with a shell-like appearance, easily disturbed off host plants and known for releasing a pungent odor when handled.
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Giant Water Bug
A massive, flattened oval true bug with powerful grasping front legs, the giant water bug is North America's largest aquatic insect and an ambush predator lurking just below the surface of still water.
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Two-Spotted Stink Bug
A boldly patterned black-and-orange predatory stink bug named for the pair of dark spots on its back, best known for hunting Colorado potato beetle larvae in gardens and fields.
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Southern Green Stink Bug
A large, shield-shaped, solid bright green true bug found on a wide variety of garden and crop plants across warm regions worldwide, recognizable by its broad body and, in some individuals, a row of small pale dots along the shoulders.
true-bugShield Bug (Stink Bug)
A broad, shield-shaped true bug that releases a sharp, pungent odour from glands on its body when disturbed, a defence that gives the whole family its common name.
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Brown Marmorated Stink Bug
An invasive, mottled brown stink bug identified by alternating light and dark bands on its antennae and abdomen edges, well known for gathering in large numbers on and inside buildings each fall.
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Non-Biting Midge
A mosquito look-alike that gathers by the thousands in swirling mating swarms near lakes and ponds, despite lacking any ability to bite.
flySpiny Oak-slug Caterpillar
A tiny, flattened slug-shaped caterpillar in shades of green, orange, or purple, bristling with clusters of branched spines that can deliver a sting if handled.
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Greenhead Fly
A stout, strikingly green-eyed horse fly that emerges from Atlantic salt marshes in midsummer swarms, where the females bite to feed on blood.
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Scorpionfly
A harmless scavenger whose alarming name comes from the male's swollen, upturned abdominal tip, which curls like a scorpion's tail but carries no sting.
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Vine Weevil
A slow, flightless, matte-black beetle that hides by day and emerges at night to notch neat semicircular bites from the edges of leaves.
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Sleepy Orange
A small, deep orange sulphur butterfly with dark wing borders and a low, wandering flight, named for a faint dark mark that suggests a half-closed, sleepy eye.
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Comma Butterfly
An orange-brown butterfly with distinctively ragged, scalloped wing edges and a small white comma-shaped mark on the underside of the hindwing, resembling a dead leaf when at rest.
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Fragile Forktail
One of North America's smallest and most delicate damselflies, the Fragile Forktail is best known for the pale green exclamation-point mark on top of its thorax.
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Asian Tiger Mosquito
A small, dark mosquito boldly marked with silvery-white stripes, including one distinctive stripe running straight down the center of its back, that bites readily in broad daylight.
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Io Moth Caterpillar
A bright lime-green caterpillar bristling with clusters of branching, stinging spines and thin red and white racing stripes along its sides.
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