62 insects containing the letter L — each with origin, classification, and notes.
Below are insects that contain the letter L anywhere in the name. Each of the 62 insects below opens to a full profile.
Tiny beetles that bore beneath tree bark to lay eggs in galleries — under normal conditions they kill only weakened trees, but when populations explode during drought or after storm damage, they can kill millions of healthy trees across entire forests; the European spruce bark beetle has killed more trees than any other insect in European history.
A large, hard-shelled beetle whose males sport antler-like mandibles used for ritualized combat over females, a member of the most species-rich animal order on Earth.
A metallic blue-green fly whose larvae (maggots) are the primary decomposers of carrion — ecologically vital as recyclers of dead matter, useful in forensic entomology, and controversial as both medical tool and livestock pest.
The sulphur-yellow butterfly that heralds spring — males are an unmistakable lemon-yellow, females a paler greenish-white; one of the longest-lived British butterflies, spending the winter as an adult hibernating among ivy and evergreen leaves, then emerging on warm February days to become the first butterfly many people see each year.
A large, fuzzy, surprisingly cold-tolerant social bee that pollinates many crops honeybees can't reach — beloved by gardeners, declining alarmingly across multiple species.
A large orange-and-black butterfly famous for an annual multi-generation migration of up to 4,800 km between Canada and central Mexico.
An aquatic insect whose larvae build elaborate protective cases from pebbles, sand, twigs, or leaf fragments cemented with silk — a key indicator of clean water quality and the inspiration for fly-fishing artificial lures.
One of the most economically damaging household insects in Britain — the adult is a harmless tiny pollen-feeder, but its larvae are the notorious "woolly bears" that devour wool carpets, stored clothing, taxidermy specimens, and museum collections; infestations can destroy irreplaceable textiles within months.
The larval stage of butterflies and moths — voracious eating machines that can consume 27,000 times their birth weight before pupating, with thousands of species ranging from harmless monarchs to dangerous puss caterpillars.
Moths with transparent wings that convincingly mimic wasps and bees — the hornet moth looks exactly like a hornet; other species mimic bumblebees or wasps so precisely that even experienced naturalists hesitate; adults are active by day and fly fast; larvae bore in tree trunks, stems, and roots for 2–3 years.
A beetle that escapes predators by snapping its body to launch itself into the air with an audible click — a remarkable mechanical hinge mechanism that can catapult the beetle up to 30 cm high.
The world's most destructive potato pest — a striped yellow-and-black beetle native to the Rocky Mountains that spread across North America and then Europe by the early 20th century, capable of stripping entire potato fields bare; Britain has so far kept it out through strict biosecurity controls.
A ragged-winged butterfly of woodland edges and hedgerows — named for the small white comma-shaped mark on the underside of its hindwing; the scalloped, jagged wing outline gives roosting adults a dead-leaf appearance of startling realism; common in England and Wales, the comma has expanded its range northward in recent decades.
A long-legged, gangly fly often mistaken for a giant mosquito — harmless as an adult, but whose larvae (leatherjackets) are significant lawn and turf pests that consume grass roots from below.
A common name applied to several different long-legged arachnids — including harvestmen (which aren't spiders), cellar spiders, and crane flies (an actual insect) — none of which are dangerous to humans despite persistent myths.
A slender relative of the dragonfly that holds its wings folded together over its back at rest — graceful aerial hunters of stream and pond edges, distinguishable from dragonflies by their delicate build.
A large family of dark-coloured, flightless desert beetles — including the mealworm beetle and the famous Namib fog-basking beetle that harvests drinking water from coastal fog on its textured back.
An ancient-wood-eating beetle whose larvae bore through structural timber in old buildings for up to 13 years — the ticking sound made by adults knocking their heads against wood to attract mates was historically heard in deathbed vigils and gave the beetle its sinister name; it has damaged medieval roofs across Britain and Europe.
A large, prehistoric-looking aquatic insect with enormous sickle-shaped jaws (in males) whose larvae spend up to three years in clean streams before emerging for a brief, non-feeding adult life of 3–7 days.
A large, fast-flying dragonfly that migrates thousands of kilometers across North America in a multi-generational journey, an ancient predator with extraordinary aerial agility.
An insect that feeds, reproduces, and navigates by animal dung — it rolls dung balls away from the pile, buries them, and lays eggs inside; the ancient Egyptians considered the scarab dung beetle sacred and a symbol of resurrection.
A bioluminescent beetle whose flashing courtship signals light up summer evenings, with each species using a distinctive flash pattern to find mates.
A wingless blood-feeding parasite that jumps astonishing distances relative to its size — agent of the medieval Black Death, perpetual pet nuisance, and one of evolution's most successful designs.
A small fly species (Drosophila melanogaster) that became the most important laboratory animal in genetics research — the workhorse of 20th-century genetics, with much of modern biology built on fruit fly studies.
Tiny insects that chemically reprogram oak trees to build elaborate protective structures around their larvae — the oak apple, marble gall, and spangle gall are all created by different gall wasp species; each species produces a uniquely shaped gall from its own chemical signals, essentially directing the tree's own cells to build a home and food supply.
A bioluminescent insect larva (or wingless adult female of certain beetles) that produces a steady greenish glow to attract prey or mates — including the New Zealand cave-dwelling species that creates one of the world's most spectacular natural light displays.
The heaviest insect on Earth — a male goliath beetle in its larval stage can weigh up to 100 grams, more than a small bird; the adults are strikingly patterned in black and white and can reach 110 mm in length; found in the tropical rainforests of Africa, they are popular in the insect-keeping hobby.
A large, fast-moving, predatory beetle that hunts at night — one of the gardener's best allies, consuming slugs, aphids, and other pests by the thousand, and a key component of healthy soil ecosystems.
A large biting fly with painful blood-feeding females — capable of cutting through skin with scissor-like mouthparts, leaving wounds that bleed freely and persist for hours, with major impacts on livestock and outdoor activities.
The master mimics of the insect world — hoverflies are entirely harmless flies that mimic the yellow-and-black warning patterns of bees and wasps with remarkable accuracy; they hover motionless mid-air and visit flowers as important pollinators; the larvae include important aphid predators and the bizarre "rat-tailed maggot" that breathes through a snorkel tube while living in polluted water.
A common name for several stout-bodied scarab beetles that emerge in early summer in North America, the bumbling, light-attracted nighttime fliers familiar to anyone with a porch light.
A delicate green or brown insect with large, elaborately veined transparent wings and golden eyes — whose larvae are ferocious aphid hunters earning them the nickname "aphid lion," making lacewings one of the most beneficial insects in gardens and agriculture.
A small, dome-shaped beetle in red, orange, or yellow with black spots — beloved by gardeners as a voracious aphid predator and a symbol of good luck across cultures.
A blood-feeding annelid worm — used in medicine for over 2,500 years, with modern medical leeches still approved by the FDA for restoring blood flow to reattached body parts and skin grafts.
A grasshopper that has transformed into the swarming phase — physiologically distinct from its solitary form, capable of forming billion-strong swarms that devastate agriculture across continents.
Beetles whose antennae are often longer than their entire body — the larvae bore through wood for years before emerging as adults; some of the most destructive tree pests in the world, while others are important wood-decay specialists in old-growth forests.
A wingless parasitic insect — head lice are particularly common among schoolchildren, body lice can transmit serious diseases including epidemic typhus, and pubic lice are a sexually transmitted parasite.
Aquatic insects with brief winged adult lives — some species live just 24 hours, with massive synchronized emergences sometimes blanketing entire towns and serving as the model for fly fishing imitation flies.
A multi-legged arthropod with two pairs of legs per body segment (unlike centipedes' one) — slow-moving detritivores essential to forest decomposition, with some giant African species reaching nearly 40 cm long.
A strange, flightless beetle with a swollen, soft abdomen and a fascinating life history — females lay thousands of eggs, the tiny larvae (triungulins) climb flowers and hitch a ride on mining bees back to their burrows, where they feed on the bee's pollen stores and develop through multiple larval stages; when threatened, the beetles exude a blistering oil (cantharidin) from their leg joints.
A delicate white butterfly of spring hedgerows — males have vivid orange wingtips that give the species its name, while females are white with black tips, easily mistaken for other whites; the underside of both sexes is marbled green and white, providing perfect camouflage on cow parsley flowers where they roost.
A dragonfly-like insect with massive owl-like compound eyes and clubbed antennae, related to lacewings, that hunts mosquitoes and small flying insects on the wing at dusk.
A land-dwelling crustacean — not an insect but an isopod — that rolls into a perfect sphere when threatened, lives in moist soil and leaf litter, and plays an essential role in breaking down decaying plant matter.
The most economically damaging forest pest in Europe — the large pine weevil is a dark, mottled brown weevil whose adults feed on the bark of young conifer trees, girdling and killing transplanted seedlings; it is the primary threat to commercial conifer replanting across Scandinavia and northern Europe, where it can destroy entire newly planted coupes; adults feed at night, concealing themselves under bark and debris by day.
The apex predators of the insect world — powerfully built flies that hunt other insects on the wing, seizing prey mid-air with spiny legs and injecting a paralysing venom, then sucking the prey dry; they tackle prey larger than themselves including wasps, bees, and dragonflies.
A large family of beetles with characteristically short wing covers that expose most of the abdomen — the most species-rich beetle family, playing crucial roles as predators, scavengers, and even ant-colony infiltrators.
A large, often metallic-shelled beetle of the Scarabaeidae family — most famously the dung beetles of African savannas, sacred in ancient Egyptian religion as a symbol of rebirth.
A bizarre-looking woodland insect named for the male's upturned, scorpion-like tail — actually the genitalia, not a sting; scorpionflies have a long, beak-like rostrum, mottled brown and yellow wings, and a peculiar habit of stealing prey from spider webs; they are significant scavengers of dead insects and small animals, and are among the oldest winged insect lineages.
A small, primitive, wingless insect with a silver-gray scaly body and a long-evolutionary lineage, found in damp homes feeding on starches, paper, and book bindings.
A spiral-shelled mollusk (technically not an insect, often grouped colloquially) that moves on a single muscular foot — an agricultural pest in gardens but a French and Italian culinary tradition (escargot, lumache).
A soft-bodied, colourful beetle named for its scarlet-and-black colour reminiscent of a British redcoat soldier — an important pollinator that visits flowers for pollen while hunting smaller insects.
A tiny soil-dwelling hexapod that leaps into the air using a spring-loaded tail appendage — among the most abundant land animals on Earth, with millions per square meter of healthy soil playing a critical role in decomposition and nutrient cycling.
Britain's largest insect — the male stag beetle's enormous antler-like jaws can be longer than his body but are used for wrestling rival males rather than biting; a declining species dependent on rotting wood in old gardens and ancient parkland; adults do not feed and live only a few weeks as adults after 3–7 years as grubs.
An ancient aquatic insect whose larvae are the gold standard of clean water — stonefly larvae require highly oxygenated, cold, unpolluted streams to survive, making them invaluable biological indicators of water quality; adults are drab, flat-winged insects that rest on bankside stones and vegetation, rarely flying far from the stream where they developed; one of the most ancient insect orders, with fossils over 300 million years old.
A large, hairy spider with a fearsome reputation that's mostly undeserved — about 1,000 species worldwide, with most posing minimal danger to humans, and the giant Goliath birdeater being the largest spider species at 30 cm leg span.
A wingless wasp despite the name "ant," covered in dense bright fur, with a famously painful sting earning the nickname "cow killer" — the female only; males have wings and don't sting.
The most damaging garden pest in Britain — its soil-dwelling larvae eat through the roots of container plants and garden favourites including fuchsia, begonia, heuchera, and strawberry, causing sudden plant collapse; the adult is a dull black beetle that notches leaf edges at night and cannot fly.
Aquatic beetles that have evolved to live in ponds, streams, and lakes — the great diving beetle is Britain's most spectacular aquatic insect, an aggressive predator that will attack fish, frogs, and newts; it carries an air bubble under its wing cases to breathe underwater and can fly between ponds at night.
A beetle with a distinctive elongated snout — among the largest insect families with over 95,000 species, including notorious agricultural pests of grain, cotton, fruit, and bark.
A small, oval beetle that gyrates in tight circles on the water surface — equipped with divided eyes that see above and below the waterline simultaneously, and with sensory organs that detect surface ripples like a sonar system.
A tiny sap-sucking insect pest that colonizes the undersides of leaves, weakening plants and transmitting viruses — a major problem in greenhouse agriculture and tropical food crops worldwide.
A small blue butterfly of California's San Francisco peninsula — extinct since the 1940s, the first North American butterfly species lost to habitat destruction, and the namesake of the Xerces Society for invertebrate conservation.
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