The Chinese giant salamander (Andrias davidianas) is the world's largest amphibian, growing to lengths of up to 6 feet. It used to be common throughout central, southwestern and southern China, where it lives in streams in the forested hills and lays up to 500 eggs at a time in underwater burrows guarded by the male. However, the Chinese giant salamander has now almost completely disappeared due to its over-exploitation as a food source.