Cockroaches of Columbia County, Oregon

Cockroaches are an ancient group of insects, most closely related to termites and somewhat more distantly related to mantises. Together they are part of a larger group that also includes grasshoppers and crickets, stick insects, earwigs, and stoneflies. Cockroaches are generalists that can live in a wide range of habitats (though rarely in cold regions) and eat opportunistically. Some species, like the German Cockroach, are social insects that live in colonies.

Western Wood Cockroach (Parcoblatta americana) – 0.6″ long. Yellowish-brown to blackish. A native species that prefers to live in grassland and open woodland rather than homes.(photo © James Bailey)
German Cockroach Blattella germanica columbia county oregon
German Cockroach (Blattella germanica) – 0.5″ long. Brown with two black streaks that are most distinct in front. Sensitive to cold and typically only found in homes in cities. Introduced from Eurasia. (photo © Nikolai Vladimirov)
American Cockroach Periplaneta americana northwest oregon columbia county
American Cockroach (Periplaneta americana) – 1.6″ long. Large cockroach, reddish-brown with yellow pronotum. Rarely seen here, preferring warmer climates. Introduced from Africa in the 1600s, despite the name. (photo © Kyle Eaton)

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