Pest Guides

Pennsylvania Wood Cockroach

Parcoblatta pennsylvanica


Wood Cockroach Image
  • Adult males are approximately 1 inch in length
  • Adult females are approximately 3/4 inch in length
  • Males are dark brown; the sides of the thorax and the front half of the wings are margined with yellow.
  • Adult males are fully winged, while females have conspicuous wing pads (short wings much like the female oriental roach), which are functionless.
  • Wings of the male are longer than its body while wing pads of the female cover only one-third-two-thirds of the abdomen.


  • Has three developmental stages: egg, nymph and adult.
  • Eggs are laid in egg capsules, produced during the warm months and deposited behind loose bark of fallen logs, dead trees or tree stumps.
  • Egg capsules are yellowish-brown and characteristically curved on both sides like a half moon.
  • Capsules are nearly twice as long than wide, containing up to 32 eggs.
  • The egg stage lasts approximately 34 days at 80 degrees Fahrenheit, while the nymphal stage typically lasts 10 to 12 months but can last up to 2 years.
  • The normal lifespan of the adult female is several months.


  • They are most commonly (unintentionally) brought into the home under the bark of
    firewood or other typical outdoor (camping supplies) apparatus.
  • By nature they are solitary and prefer not to live near people, or indoor environments
    typically inhabited by people.
  • They feed primarily on decaying organic matter.
  • Females and males have been found under shingles and on the inside of garages; but
    they rarely breed indoors.
  • Will attempt to scatter quickly if disturbed, not aggressive.

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