Amphibians of North Carolina Green Frog Lithobates clamitans Northern green frog Washington Department of Fish & Wildlife Melanotan II (Tan Jabs): Why They're Not Worth The Risk 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, Partially leucistic Green Frog (Lithobates clamitans melanota) found in Download Scientific Diagram