#House crickets are closely related to grasshoppers and locusts, like them they have hind legs which are modified for jumping. Crickets have two pairs of wings though only the back wings are used in flight. House crickets often show up in new buildings most likely because such places provide good shelter and food, and half finished houses are easy to enter.

Only the male cricket sings to attract a mate. Crickets rub the teeth on the edge of one wing against a rough scraper on the opposite wing, using it as a bow. House crickets take 60-90 days to complete their life cycle. Eggs are deposited in whatever damp substrate is provided. Juveniles resemble the adults except for being smaller and wingless. Females lay between 50 to 100 eggs hatching 2 to 3 weeks. Crickets will eat almost any kind of organic matter. They prefer soft plant matter, but will eat other insects and carrion.