The second, Rana aurora draytonii , or the Calfornia Red-legged frog, occupies central and southern portions of the state, west of the Sierran divides and into the mountains of southern California up to an altitude of 4000 feet. It is reddish brown to gray and contains many poorly defined dark specks and blotches, which are absent on the back and top of its head. A light stripe on its jaw borders its dark mask. Folds are present on its back and sides, and the underside is yellow with red on the lower abdomen and hind legs. Its toes are not fully webbed.
Females grow larger than males.
Males, however, have enlarged forearms and swollen thumbs. Rana aurora aurora has very smooth and thin skin and an unspotted dorsal surface. Rana aurora draytonii has thick, rough skin, light centered spots on its dorsal surface, and a larger build. Adults feed on invertebrates, small mammals and other amphibians like the small tree frog. Larvae are thought to feed on algae.