Green frog (Rana clamitans)
The green frog (Rana clamitans, aka Lithobates clamitans) is one of the most common frogs in Massachusetts, and can be found in all types of freshwater wetlands. Their coloring varies from green to olive to brown, although according to one guide book I consulted, regardless of body color they tend to have a green upper lip. Green frogs look somewhat similar to bullfrogs (Rana catesbeiana), but green frogs have a pair of dorsolateral ridges that extend the length of their…