Pest Library Cockroaches American Cockroach

American Cockroach

Periplaneta americana

American cockroaches are large, reddish-brown roaches that sometimes enter homes from outdoors. Infestations usually mean there’s a leak or a plumbing problem inside your home.

American Cockroach

About this species

American cockroaches prefer warm, damp areas like:

  • Sewers and drains
  • Basements
  • Boiler rooms
  • Around plumbing

They often enter homes by traveling through sewer pipes and drains. If you have American cockroaches, check for plumbing problems and dry P-traps in unused drains. Adults can fly short distances when it’s hot (above 85°F).

American Cockroach photo Image by Bob Adams from Amanzimtoti, South Africa, CC BY-SA 2.0, via Wikimedia Commons

Identification

Relative size of pest

Size:

1½–2 inches (38–51 mm)

Color:

Deep reddish-brown, with a pale yellow border on their head

Image by Gary Alpert, CC BY-SA 3.0, via Wikimedia Commons

Key ID Features:

  • A yellowish figure-8 or pale border (pronotum halo) behind the head
  • Wings extend past the abdomen in both sexes

Photos

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