Northern green frog Washington Department of Fish & Wildlife Green Frog Lithobates clamitans Vermont Reptile and Amphibian Atlas Melanotan II in Santa Barbara, CA Eternity Health Partners Green Frog Lithobates clamitans Green Frogs (Lithobates clamitans) are very territorial, especially the males. You can differentiate their sexes since they are dimorphic (showing observable differences in form, color, size, or structure between sexes). For example, Lithobates clamitans Facts, Diet, Habitat & Pictures on Animalia.bio