Varied Carpet Beetle vs Bed Bug
Varied Carpet Beetles and bed bugs are easy to mix up at a glance, but a few details separate them quickly. Here is how to tell which one you found and what, if anything, you should do about it.
Quick answer
Check for this first. A varied carpet beetle has very small, round beetle with a mottled scale pattern, while a bed bug has flat, oval, reddish-brown body without wings.
Side-by-side comparison
| Varied Carpet Beetle | Bed Bug | |
|---|---|---|
| Group | Beetles | True Bugs |
| Scientific name | Anthrenus verbasci | Cimex lectularius |
| Size | 2–3.5 mm | 4–7 mm |
| Colors | Black, White, Yellow and Brown | Brown and Red |
| Legs | 6 legs | 6 legs |
| Wings | Yes | No |
| Bites or stings | No | Bites |
| Risk | Nuisance | Can bite or sting |
| Key feature | Very small, round beetle with a mottled scale pattern | Flat, oval, reddish-brown body without wings |
Key differences
- Group: Varied Carpet Beetle belongs to beetles, while bed bug belongs to true bugs. Hard wing covers that meet in a straight line down the back.
- Size: Bed Bugs are larger, reaching 7 mm, while varied carpet beetles top out around 3.5 mm.
- Wings: Varied Carpet Beetles have wings, while bed bugs are usually seen without them.
- Color: Varied Carpet Beetles are black, white, yellow and brown; bed bugs are brown and red.
- Risk: the varied carpet beetle is a nuisance pest but not a health threat to most people, while the bed bug can bite or sting, usually with mild, local effects.
- Where found: look for varied carpet beetles in bedrooms and beds and indoors; bed bugs turn up in bedrooms and beds.
- Signature feature: Varied Carpet Beetles: very small, round beetle with a mottled scale pattern. Bed Bugs: flat, oval, reddish-brown body without wings.
How to identify varied carpet beetles
A tiny, round beetle mottled with white, brown and yellow scales. The fuzzy, banded larvae chew holes in wool, silk, feathers, leather and stored animal products.
- Very small, round beetle with a mottled scale pattern
- Fuzzy, striped larvae with a tuft of hair at the tail
- Found on windowsills in spring and in closets year-round
How to identify bed bugs
A flat, oval, apple-seed-sized insect that hides in mattress seams, bed frames and furniture and feeds on human blood at night. Infestations spread through luggage, used furniture and shared walls.
- Flat, oval, reddish-brown body without wings
- Rust-colored stains or tiny black dots on mattress seams
- Itchy bites, often in lines or clusters
Which one is more dangerous?
The bed bug carries more risk. Bed bug bites itch and cause stress and sleep loss, but bed bugs are not known to spread disease.
Carpet beetles don't bite, but larval hairs can cause itchy skin rashes in some people. Bed bug bites itch and cause stress and sleep loss, but bed bugs are not known to spread disease.
Where and when you'll see each
Varied Carpet Beetles turn up in bedrooms and beds and indoors, mostly in spring and summer. Bed Bugs turn up in bedrooms and beds, mostly in spring, summer, fall and winter.
Because they share habitat, you may find both in the same place, so check each individual.
What to do if you find one
Varied Carpet Beetles: Vacuum carpets, closets, baseboards and under furniture often. Read the full removal guide for more.
Bed Bugs: Inspect mattress seams, headboards and furniture joints with a flashlight. Read the full removal guide for more.
Biology: beetles and true bugs
Beetles go through complete metamorphosis: egg, larva (grub), pupa and adult. The larval stage often does the most feeding and damage, and it can last from a few weeks to several years depending on the species. Adults protect their flight wings under hard wing covers called elytra, which is why most beetles look armored and meet in a neat line down the back.
True bugs have piercing, straw-like mouthparts used to suck plant sap or, in a few species, blood. They develop through gradual metamorphosis: nymphs look like small, wingless adults and molt several times as they grow. Many release strong odors from scent glands when threatened.
Frequently asked questions
What is the main difference between varied carpet beetles and bed bugs?
Group: Varied Carpet Beetle belongs to beetles, while bed bug belongs to true bugs. Hard wing covers that meet in a straight line down the back.
Which is bigger, a varied carpet beetle or a bed bug?
Varied Carpet Beetle: 2–3.5 mm. Bed Bug: 4–7 mm.
Do varied carpet beetles or bed bugs bite?
Varied Carpet Beetles do not bite. Bed Bugs can bite.
Where are they usually found?
Varied Carpet Beetles: in bedrooms and beds and indoors. Bed Bugs: in bedrooms and beds.