What is the average lifespan of an adult American roach?

The average lifespan of an adult American cockroach is typically around 600 to 700 days under favorable conditions, which aligns well with the choice of 630 days. This duration can be influenced by factors such as environment, availability of food, and the presence of predators. Adult American roaches are known for their adaptability and resilience, which contribute to their longevity. In natural settings, they can live long enough to reproduce multiple times, furthering their species' survival. Thus, the selection of 630 days accurately reflects the average lifespan of these insects within the given range.