Gray Bugs With Wings: 12 Types
These are the 12 most common gray bugs with wings found in North America.
Quick list
How to narrow it down
Narrow it down with three quick checks. Count the legs: insects have six, spiders and ticks have eight, and centipedes and millipedes have many more. Check for wings, even folded ones. Then compare size against a coin: a US penny is 19 mm across. Our bug identifier tool does this filtering for you.
The 12 bugs
Mosquito
MosquitoCulicidae (e.g. Aedes albopictus)A small, slender fly whose females bite to take blood for egg production. The Asian tiger mosquito is black with white stripes and bites aggressively during the day.
Tell-tale sign: Long, needle-like mouthpart (proboscis). Risk: Mosquito bites itch and, depending on the region, can transmit West Nile, dengue and other viruses.
Blister Beetle
Blister BeetleEpicauta spp.A long, soft-bodied beetle with a narrow neck that feeds on flowers and vegetable foliage. Its body contains cantharidin, a chemical that raises blisters on skin.
Tell-tale sign: Long, soft, cylindrical body with flexible wing covers. Risk: Handling or crushing blister beetles can cause painful skin blisters, and hay contaminated with them can poison horses.
Horse Fly
Horse FlyTabanus spp.A large, stout fly with huge eyes that pursues people, horses and cattle for blood. Females slice skin with blade-like mouthparts, causing a sharp, painful bite.
Tell-tale sign: Large, heavy body with very large, often iridescent eyes. Risk: Horse fly bites are painful and can swell; they rarely transmit disease to people in the US.
Wheel Bug
Wheel BugArilus cristatusA large, gray assassin bug with a raised, toothed crest on its back that looks like half a gear wheel. It hunts caterpillars and beetles and is a garden ally.
Tell-tale sign: Semicircular, cog-like crest on the thorax. Risk: Its bite is extremely painful and can take days or weeks to heal, so avoid handling it.
Brown Marmorated Stink Bug
Brown Marmorated Stink BugHalyomorpha halysA shield-shaped, mottled brown bug that invades homes in fall to overwinter and feeds on fruit and vegetables in summer. It releases a sharp odor when disturbed or crushed.
Tell-tale sign: Shield-shaped, marbled brown body. Risk: Stink bugs don't bite or sting people; they are a household and crop nuisance.
Drain Fly
Drain FlyClogmia albipunctataA small, fuzzy, moth-like fly that rests on bathroom walls near sinks, tubs and floor drains. Its larvae live in the slimy film inside drains.
Tell-tale sign: Fuzzy, gray, leaf-shaped wings held roof-like over the body. Risk: Drain flies don't bite and aren't known to spread disease in homes.
Fungus Gnat
Fungus GnatBradysia spp.A tiny, dark, mosquito-like fly that hovers around houseplants and windows. Its larvae live in moist potting soil and feed on fungi and roots.
Tell-tale sign: Delicate dark body with long legs and antennae. Risk: Fungus gnats don't bite; larvae can damage seedlings and young roots.
House Fly
House FlyMusca domesticaThe most common fly in homes, a dull gray fly with four dark stripes on its thorax. It breeds in garbage, manure and rotting food and lands on nearly everything.
Tell-tale sign: Four dark lengthwise stripes on a gray thorax. Risk: House flies don't bite, but they can carry bacteria that cause food poisoning.
Spotted Lanternfly
Spotted LanternflyLycorma delicatulaAn invasive planthopper spreading through the eastern US that feeds on grapevines, maples and tree of heaven. Its folded gray forewings hide bright red hind wings.
Tell-tale sign: Gray forewings with black spots. Risk: Spotted lanternflies don't bite or sting; they damage vineyards and leave sticky honeydew.
Squash Bug
Squash BugAnasa tristisA flat, grayish-brown bug that sucks sap from squash and pumpkin vines, causing leaves to wilt and turn crispy. Clusters of bronze eggs appear on leaf undersides.
Tell-tale sign: Flattened, dull gray-brown body. Risk: Squash bugs don't harm people; they can wipe out squash and pumpkin plants.
Crane Fly
Crane FlyTipula spp.A huge, fragile, long-legged fly often mistaken for a giant mosquito. Adults barely feed, and the larvae, called leatherjackets, eat grass roots.
Tell-tale sign: Extremely long, thin legs that detach easily. Risk: Crane flies cannot bite or sting and do not eat mosquitoes, despite the nickname mosquito hawk.
Eyed Click Beetle
Eyed Click BeetleAlaus oculatusA long, gray-and-black beetle with two large, eye-like spots on its thorax. When flipped over, it snaps a hinge on its body and launches itself into the air with an audible click.
Tell-tale sign: Two large black false eyespots ringed in white. Risk: Eyed click beetles are harmless; the eyespots are a bluff to scare predators.
Which ones should you worry about?
4 of the 12 bugs in this guide can bite or sting. The ones to take seriously are mosquito. The rest are harmless or simply a nuisance.
Comparison at a glance
| Mosquito | Blister Beetle | Horse Fly | |
|---|---|---|---|
| Group | Flies & Mosquitoes | Beetles | Flies & Mosquitoes |
| Scientific name | Culicidae (e.g. Aedes albopictus) | Epicauta spp. | Tabanus spp. |
| Size | 3–6 mm | 8–25 mm | 10–30 mm |
| Colors | Black, White and Gray | Black, Gray and Orange | Black, Brown and Gray |
| Legs | 6 legs | 6 legs | 6 legs |
| Wings | Yes | Yes | Yes |
| Bites or stings | Bites | No | Bites |
| Risk | Health risk | Can bite or sting | Can bite or sting |
| Key feature | Long, needle-like mouthpart (proboscis) | Long, soft, cylindrical body with flexible wing covers | Large, heavy body with very large, often iridescent eyes |
Frequently asked questions
What is the most common one?
Among the bugs in this guide, the mosquito and blister beetle are the ones people ask about most.
Which of these are dangerous?
Mosquito can be medically significant.
How can I identify a bug I found?
Use the free bug identifier tool: choose the number of legs, wings, main color, size and where you found it, and it will list the closest matches.