German Cockroach

The German cockroach is very successful at establishing an ecological niche in buildings, and is hardy and resilient. Some sources of this resilency are the lack of natural predators in a human habitat, the large number of nymphs produced at one time, the short period between birth and sexual maturity, and the roaches’ ability to easily hide. German cockroaches are thigmotatic, meaning they prefer close spaces, and small compared to other species, which makes them adept at fitting into small cracks and crevices, thereby evading humans and eradication efforts.