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Ectobius lapponicus


  • Adult males 3/8"-7/16".
  • Adult females 1/4"-5/16".
  • Body dark grey–brown except for dark male pronotum and female dark brown abdomen.


  • Egg cases, know as oothecae, are produced and carried by the female for one or two days between June and September.
  • The oothecae overwinter on the ground and the nymphs hatch in the spring.
  • The nymphs hibernate during the late stages of development to become adult in July.
  • The adults die in September to October.


  • The dusky cockroach is mainly ground–dwelling and favours scrub, grassland and woodland habitats.
  • Males only fly in warm weather.

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