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.
Green Bottle Fly
A brilliantly iridescent, metallic green fly frequently seen basking on sunny surfaces outdoors, easily recognized by its shining emerald body and quick, buzzing flight.
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Black Fly Larva
Anchored to submerged rocks in fast-flowing streams by a silken thread, the black fly larva bends into the current and combs the water for drifting particles with a pair of delicate, fan-shaped feeding brushes.
aquatic-insect
Yellow Dung Fly
A golden, densely furred fly whose bright males cluster on fresh cow pats in pastures, competing for mates while ambushing smaller insects drawn to the same spot.
flyPicture-Winged Fly
A small fly whose clear wings are decorated with bold bands, spots, or intricate patterns, often waved and flicked in slow, deliberate displays that give the impression of a tiny fan being opened and closed. Some species even raise their patterned wings above the body and walk sideways in courtship displays reminiscent of a strutting peacock.
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Fruit Fly (Mediterranean)
A small but strikingly patterned fly with mottled, banded wings held out to the sides in a fan and a body dotted with silvery spots, best known for larvae that tunnel through ripening fruit. Native to sub-Saharan Africa, it has spread with human trade to become one of the most widely recognized fruit-infesting insects in the world.
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Common House Fly
A dull gray fly with four dark stripes down its back, the house fly is one of the most familiar insects on Earth, following people and their food waste to every continent.
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Blue Bottle Fly
A robust fly with a glossy, metallic blue-black body and a loud buzzing flight, commonly seen around outdoor waste and occasionally indoors, easily recognized by its shiny coloring and bristly frame.
flyGnat
A catch-all common name for a wide range of tiny, delicate flies, some no bigger than a grain of pepper, often seen hovering in small clouds near water, moist soil, or overripe produce.
flyPunkie
An almost invisibly small biting fly that swarms near wetlands at dusk, where only the females take blood meals from animal hosts.
flyIchneumon Wasp
A slender, long-antennaed parasitoid wasp, often mistaken for a giant mosquito or a stinging insect, that is best known for the extraordinarily long ovipositor some species use to drill into wood and lay eggs on hidden larvae.
waspFungus Gnat
A small, dark, mosquito-like fly with long legs and delicate smoky wings, often seen weakly fluttering around houseplants or crawling across damp potting soil.
flyRat-Tailed Maggot
Named for its long, thin, telescoping breathing tube, the rat-tailed maggot is the aquatic larva of the drone fly, thriving in stagnant, low-oxygen water where few other insects can survive.
aquatic-insect
Common Housefly
A dull gray fly with four dark stripes on its thorax and large reddish eyes, one of the most widespread insects on Earth thanks to its close association with human food and waste.
flyHoverfly
A slender, bee- or wasp-patterned fly known for its remarkable ability to hover motionless in midair before darting suddenly to a new flower.
flyMaggot
A pale, legless, tapering grub that wriggles through rotting food and organic waste, the larval stage of a fly.
caterpillar-larva
Cicada
A stout, big-eyed insect best known for the loud, buzzing chorus of song produced by males, and for periodical species that emerge from the ground by the millions after living underground for over a decade.
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Granary Weevil
A small, shiny, dark reddish-brown to black weevil with a long curved snout that is unable to fly, spending its entire life cycle within stores of wheat and other cereal grains.
beetle
Assassin Bug
A slender, long-legged predatory true bug with a curved, needle-like beak used to ambush and pierce other insects, often patterned in bold orange, black, or red warning colors.
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Spotted Wing Drosophila
A tiny reddish-brown fruit fly, each male marked with a single dark spot near the wingtip, notable for laying eggs in ripening rather than overripe fruit.
flySand Wasp
A fast, sun-loving solitary wasp with large green or grayish eyes and yellow-striped markings that digs burrows in loose sand and provisions them almost entirely with flies.
waspNo-See-Um
A speck-sized fly so tiny it seems to vanish from sight, yet capable of swarming exposed skin near beaches and marshes at dawn and dusk.
flyCaddisfly Larva
A soft-bodied aquatic larva famous for building a portable protective case from sand, gravel, or plant debris bound together with silk.
aquatic-insect
Whitefly
A tiny, moth-like white insect that clusters on the undersides of leaves and bursts into a snowy cloud when the plant is disturbed. Despite the name, it is not a true fly but a sap-feeding relative of aphids and scale insects.
true-bug
Tussock Moth
A moth with a striking split lifestyle: winged, drab gray-brown males fly to seek out flightless, grub-like females, while the ornate caterpillars sport dense tufts of colorful bristly hair.
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