Blattella Germanica
The German cockroach occurs widely in human buildings, but is particularly associated with restaurants, food processing facilities, hotels, and institutional establishments such as nursing homes.
The problem in controlling German cockroaches is the nature of their population behaviour. Though they are not social and practise no organised maternal care, females carry oothecae of 18-50 eggs during incubation until just before hatching, instead of dropping them as most other species of cockroaches do. This protects the eggs from certain classes of predation.