Insect identifier · Indoor insects
How to identify a Bat bug
Cimex pilosellus
· Also called batbug, bat bug, bat bug vs bed bug, bugs from attic bats
Looks almost identical to a bed bug. Bat bugs usually mean a bat roost in the attic. Mattress-only treatment fails if bats remain.
Looks like a bed bug. Attic bats change everything. Mattress-only treatment fails. Wildlife exclusion, then insects. Do not handle bats. A pest pro with a lens can look at thorax hairs. If you have bats and bed-bug-looking insects, start in the attic, not only the bed.
What does a bat bug look like?
Like a bed bug; longer hairs on the thorax edge need a lens. Found near attics first, not only mattress seams.
Bat bug (Cimex pilosellus) is Like a bed bug, ~5 mm. Colors people notice: brown, red. Field marks: Looks almost identical to a bed bug without magnification; Longer hairs along the thorax edge (needs a lens); Found near attics and bat entry points more than mattress seams first. It is found indoor. If those marks are missing, open Bed bug before you force this name. Search phrases that belong on this page include what a bat bug looks like and bat bug identification.
Identification marks
- Looks almost identical to a bed bug without magnification
- Longer hairs along the thorax edge (needs a lens)
- Found near attics and bat entry points more than mattress seams first
Size: Like a bed bug, ~5 mm
Colors: brown, red
Where: indoor
What a typical bat bug bite looks like
Itchy welts similar to bed bugs after bats in the attic. Confirm ID with a pest professional.
People searching “bat bug bite identification” want the pattern, not a single anonymous bump. Itchy welts similar to bed bugs, often after bats in the attic. Immediate steps on this page: Do not treat as a simple mattress problem until bats are excluded by a professional; Heat-wash linens; Soothe itch; Confirm ID with a pest professional — control differs from bed bugs. This species does bite or sting people. Fever, spreading redness, trouble breathing, or a child with many stings is professional care.
If you were bitten
- Do not treat as a simple mattress problem until bats are excluded by a professional
- Heat-wash linens
- Soothe itch
- Confirm ID with a pest professional — control differs from bed bugs
Bat bug vs Bed bug
Looks like a bed bug. Attic bats are the fork in the road. If you only treat the mattress, they come back from the roost.
- Bed bug identification (Cimex lectularius)
- Varied carpet beetle identification (Anthrenus verbasci)
Range and season
Wherever bats roost in buildings, year-round.
Buildings with bat roosts, year-round.
Wherever bats roost in buildings across North America. Often mistaken for bed bugs.
Year-round if bats are in the structure
Common questions
Bat bug vs bed bug?
They look nearly the same. Bat bugs usually mean a bat roost is nearby. A pro with a microscope can separate them.
Will treating the mattress be enough?
Not if bats remain. Source control is the roost.
Do they spread disease?
They are mainly an itch and infestation issue, like bed bugs.
Do bat bugs infest beds?
They can wander to people when bats leave or the roost is adjacent. Source control is the attic.