Lithobates is a genus of frogs belonging to the family Ranidae, native to the Americas. The name is derived from Ancient Greek: litho- (stone) and βάτης : bátēs, meaning one that treads on rock, or rock climber. As presently defined, it includes many of eastern North America's most familiar aquatic frog species, including the American bullfrog, green frog, and the leopard frogs.