University of Florida

Identifying Bed Bugs

Bed bug size comparison with a nickel, Photo credit: Whitney Cranshaw, Colorado State University, Bugwood.org

Bed bugs are reddish-brown, flat insects about the size of a tick. They can be seen with the human eye.

Before feeding, bed bugs have a wide, rectangular appearance. After feeding, adult bed bugs have a more elongate shape and redder color.
Bed bug comparison before and after feeding
Engorged bed bug, Photo credit: Whitney Cranshaw, Colorado State University, Bugwood.org

Look for bed bug egg cases.
Bed bug eggs, Photo credit: Gary Alpert, Harvard University, Bugwood.org

Bed bugs, their excrement, nymphs, and eggs can also be found in cracks and crevices, such as mattress seams and bed skirts.
Bed bugs in mattress seam, Photo credit: Gary Alpert, Harvard University, Bugwood.org
Bed bugs and excrement in a bed skirt