Red-legged Frog is a common name for two alike kinds of frog of the west coast of North America, which are also known, in distinction from each other, as the Northern Red-legged Frog and the California Red-legged Frog. For Wikipedia aspects see WikipediaNaming conventions (common names, WikipediaNaming conventions, and WikipediaStyle manual. The Northern Red-legged Frog, Rana aurora, is a protected Species of Amphibian, whose range is the coastal region stretching from The California Red-legged Frog is a moderate to large (44-14 cm Species of Frog. These two kinds have long been thought mere subspecies of Rana aurora, respectively R. a. aurora and R. a. draytonii, with "Red-legged Frog" accordingly applying to that species as a whole. Genetic evidence, though, points to their being two distinct species, respectively Rana aurora and Rana draytonii. [1]