The Cecropia Moth (Hyalophora cecropia) is North America's largest native moth. It is a member of the Saturniidae family, or giant silk moths. Females with a wingspan of six inches (160 mm) or more have been documented. It is found as far west as the Rocky Mountains and north into the majority of Canadian provinces. The larvae of these moths are most commonly found on maple trees, but they have been known to feed on cherry and birch trees among many others.