
German cockroach
Blattella germanica
Light brown to tan with two dark parallel stripes on the shield behind the head. German cockroaches can't survive Colorado winters outdoors, so they live entirely inside: kitchens, bathrooms, dishwashers, microwaves, motor housings of refrigerators. The female carries her egg capsule (30–40 eggs) until it is about to hatch, which protects the eggs from many treatments. Nymphs reach adulthood in roughly two to three months in a warm kitchen, so populations climb fast.







