Field-cockroach
Guides
Blattella vaga
Field Cockroach
Blattella vaga, the field cockroach, is a small outdoor-dwelling cockroach in the family Ectobiidae. First described from Arizona and California in 1935, it has since been recorded across North America and introduced to parts of Europe, Asia, and Australia. It resembles the German cockroach (Blattella germanica) but is not a significant indoor pest, typically entering buildings only during hot or dry conditions. The species harbors bacterial gut symbionts with demonstrated antimicrobial properties.
Ectobius
wood cockroaches, field cockroaches
Ectobius is a genus of small, cool-adapted cockroaches in the family Ectobiidae. Adults measure 6–12 mm in length with brown to yellowish coloration and pale margins. The genus has a complex biogeographic history: fossil evidence from the 49-million-year-old Green River Formation in Colorado indicates Ectobius originated in North America, despite its long absence from the continent until recent reintroductions. Species are primarily distributed across Europe, Africa, the eastern Palearctic, and the Near East. Several species have been introduced to northeastern North America within the last 65 years, where Ectobius lapponicus has become synanthropic.