German Cockroach

Primarily indoor human structures, especially kitchens and bathrooms near heat and moisture

Omnivorous scavenger that eats human food, grease, soap, glue, and organic matter

Nocturnal, fast-running, and highly prolific breeders; they tend to remain hidden in cracks and crevices during the day

Major pest that can transmit bacteria (Salmonella/E. coli) and trigger asthma-related allergies; no significant ecosystem benefits in indoor settings