The Rhinodermatidae, commonly known as Darwin's frogs, are a family of small frogs found on the southwest coast of South America. The monotypic genus (Rhinoderma), has just two species, of which the Chile Darwin's frog (R. rufum) is highly endangered or may already be extinct. The better-known Darwin's frog (R. darwinii) is vulnerable. Darwin's frogs are small, reaching a size of only 3 cm (1.2 in) in length. They are predominantly green frogs, with patches of brown, and have long, narrow noses. They are primarily terrestrial.