How to Identify Bugs in Your House
Sort by color, size, room and wings — most sightings narrow to two or three likely species in under a minute.
Short answer
Figuring out how to identify bugs in your house usually comes down to three quick questions: what color is it, how big is it next to something you’re already holding, and which room did you spot it in. Wings or no wings narrows things further still.
- Compare the color you see to black, brown, reddish-brown, gray or pale — go by the insect itself, not a photo.
- Measure it against something you know the size of: a grain of rice runs about 5 mm, a match head about 2 mm.
- Note the room. A kitchen sighting and a bathroom sighting are almost never the same insect.
Identify bugs in your house by what you can see
The Bug Finder on the homepage does the sorting for you: pick a color, a size, a room and whether it flew, and it narrows the list to the species that actually match. If you’re only confident about one detail, browse by that single axis instead:
- By color: black, brown, reddish-brown, gray or pale.
- By size: from a speck under 2 mm to something over 12 mm.
- By room: kitchen, bathroom, bedroom, living room or basement.
Or browse the full catalogue
Prefer to scan photos and answer ‘what bug is this’ yourself? The species index holds every profile we’ve published, each with a size reference and a note on the species it’s most often confused with. If it came out of a kitchen cabinet, pantry bugs sorts the six that turn up in dry goods.
Twelve profiles ready now
House bugs rarely show up on a schedule, so we’re building this catalogue one species at a time rather than all at once. These twelve profiles are live:
- Carpet beetle: mottled adults, bristly larvae, and damage to wool or stored fabric.
- Silverfish: silvery and teardrop-shaped, almost always found somewhere damp.
- Pantry moth: small gray-brown moths, plus webbing left behind in dry goods.
- Clothes moth: plain buff-tan wings, no pattern, hides in dark closet corners rather than at a window.
- Gnats and drain flies: two unrelated flies, told apart by shape and where you spot them.
- Flour weevil: reddish-brown, a snout means a true weevil, no snout means a flour beetle.
- Drugstore beetle: small, fuzzy reddish-brown beetle with grooved wing covers, found in pantry staples and old books.
- Cigarette beetle: reddish-brown with a smooth, humped shell, easily confused with the drugstore beetle.
- Booklice: tiny and pale, walk instead of jump, and show up wherever paper or plaster stays damp.
- Springtail: tiny wingless hexapods that jump when disturbed and gather wherever moisture is constant.
- Fruit fly: red-eyed and fruit-landing, easily confused with fungus gnats and drain flies.
- Clover mite: reddish, pinhead-sized, and prone to sudden swarms on sunny windowsills in spring and fall.
The shortcut: snap a photo next to a coin before it moves or gets squashed. Scale is the detail people misremember most, and it’s the first thing the finder asks for.
Does spotting one bug mean I have an infestation?
Not usually. A single sighting is often just a scout, or a one-off. What’s worth acting on is a pattern: repeated sightings in the same room, or larvae rather than adults.
What if I can’t tell the color in low light?
Move it gently, in a jar or on a sheet of paper, to a window or under an overhead light. Lamp light tends to warm up the color, so daylight is the more reliable read.
Already know what it is? The removal protocols cover eight common house bugs, all eight of them live right now.