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, Does Melanotan 2 Change Eye Color YouTube Partially leucistic Green Frog (Lithobates clamitans melanota) found in Download Scientific Diagram Northern green frog Washington Department of Fish & Wildlife