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Bullfrogs are green or brown, usually with dark spots or mottling (but not large rounded spots). The eardrums are large, with a fold of skin curving around the top and rear edges. The hind toes are more or less fully webbed but the 4th toe extends beyond the webbing. There are no ridges along each side of the back. Maximum snout-vent length is about 8 inches (20 cm). In mature males, the eardrum...