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.
Pine Processionary Moth
An unremarkable grey-brown moth known almost entirely through its larvae, which build large silken nests in pine trees and travel to feed in long, head-to-tail processions covered in fine defensive hairs.
moth
Common Buckeye
A medium-sized brown butterfly instantly recognizable by the large, colorful eyespots ringed in orange and blue on both its forewings and hindwings, thought to startle or deflect the attacks of predators.
butterfly
Rose Hair Tarantula
A calm, ground-dwelling tarantula from the deserts of Chile, the rose hair is named for the pinkish sheen its bristly hairs can take on in certain light, and is known for its slow, deliberate movements and generally placid temperament.
spider
Monarch Caterpillar
A boldly banded caterpillar in white, yellow, and black stripes, unmistakable as it munches its way through milkweed leaves before transforming into North America's most famous migratory butterfly.
caterpillar-larva
German Yellowjacket
A black-and-yellow social wasp closely resembling the common wasp, distinguished by three black facial dots, that builds large paper nests in wall voids and roof cavities and is widespread in both its native and introduced ranges.
wasp
Great Golden Digger Wasp
A large, strikingly two-toned solitary wasp with a golden-haired thorax, reddish-orange midsection, and black-tipped abdomen, often seen digging burrows in bare soil to stock with paralyzed katydids and crickets.
wasp
Glowworm Beetle
A beetle whose females remain larva-like and glowing for their entire lives, producing rows of soft greenish light along their segmented, worm-like bodies, while males develop into small, feathery-antennaed flying beetles.
beetle
Soldier Fly Larva
Flattened, leathery, and tapered at both ends, the soldier fly larva drifts just beneath the surface film of ponds and marshes, filtering algae and organic debris while breathing through a fringe of water-repellent hairs at its tail.
aquatic-insect
Horse Fly Larva
Hidden in the wet mud along pond and stream margins, the horse fly larva is a tapered, tough-skinned predator that hunts other small soil and mud-dwelling invertebrates before eventually transforming into the familiar biting fly.
aquatic-insect
Regal Moth (Hickory Horned Devil)
One of the largest moths in North America, with orange-red and gray-veined wings on the adult, best known for its enormous, formidable-looking caterpillar, the hickory horned devil, a blue-green giant bristling with long orange spines.
moth
Bagworm Moth
A moth best known for its larva's habit of constructing and living inside a spindle-shaped case of silk and plant debris that hangs from twigs, with adult males a plain sooty-winged moth and females remaining wingless and grub-like inside the bag for life.
moth
Variegated Fritillary
A wide-ranging, mottled orange-brown butterfly that lacks the silvery underside spots of true fritillaries and instead shows an intricate patchwork of tan, orange, and black markings, known for its wandering, migratory habits.
butterfly
Gypsy Moth (Spongy Moth)
A strongly sexually dimorphic moth, recently renamed the Spongy Moth for its distinctive spongy, tan egg masses, whose caterpillars are known for periodically defoliating oak and other hardwood trees in large outbreak years.
moth
Blue Morpho
A large Neotropical butterfly famed for the brilliant, shimmering iridescent blue of its wing uppersides, which flashes vividly in flight and disappears instantly when the cryptic brown underside is exposed at rest.
butterfly
Brown Dog Tick
A uniformly reddish-brown tick with an elongated body, the brown dog tick is unusual among ticks for being able to complete its entire life cycle indoors around wherever dogs rest. It has spread to warm regions worldwide largely by traveling with its preferred host.
arachnid
Spider Wasp
A quick, nervous-flying solitary wasp with long spiny legs and constantly flicking wings, recognized for its habit of running across open ground in short bursts while hunting spiders to paralyze and store for its young.
wasp
Gray Hairstreak
A small slate-gray butterfly with thin white lines, an orange-capped black spot near the hindwing tail, and one of the broadest host-plant ranges of any North American butterfly, making it a familiar visitor to gardens and fields alike.
butterfly
Bombardier Beetle
A dark, quick-moving ground beetle famous for firing a hot, audible chemical spray from its abdomen when disturbed, using two-tone coloring of a reddish head and thorax against blue-black wing covers as a warning signal.
beetle
Warble Fly
A furry, bee-mimicking fly that never lands on flowers or feeds as an adult, spending its brief life darting around grazing cattle to lay eggs on their legs and lower body. Herds sometimes react with sudden panicked runs, known as gadding, whenever a warble fly approaches.
fly
Human Bot Fly
A stout, dark-bodied fly from the American tropics famous for an unusual reproductive trick: it captures a blood-feeding mosquito mid-flight and glues its own eggs to the mosquito's body before releasing it to carry them to a future host. The adult itself is rarely seen, spending most of its short life in shaded forest understory.
fly
Southern Black Widow
Glossy jet-black and marked with a bright red hourglass on the underside of its rounded abdomen, the southern black widow is one of the most recognizable spiders in North America, typically found tucked into quiet, undisturbed corners rather than out in the open.
spider
Bot Fly
A stocky, bumblebee-mimicking fly whose adults never feed and live only long enough to mate and locate a rodent or rabbit burrow for their eggs. Despite their harmless, buzzing adult stage, bot flies are best known through the larvae that develop as internal parasites of small mammals.
fly
Promethea Moth
A medium-sized silk moth showing striking differences between the sexes, with dark, blackish-maroon males that mimic a distasteful swallowtail butterfly in flight and larger, more colorful reddish-brown females marked with pale borders and eyespots.
moth
Harvestman
An arachnid built almost entirely of legs, with a single compact, oval body segment and no waist separating it into two parts like a true spider. Common in gardens and forests worldwide, it scuttles along on impossibly long, thin legs scavenging for food after dark.
arachnid