Columbia Spotted Frog vs. Wood Frog

Both are brown pond frogs of Wyoming's mountains with ridges down the back. A: the Columbia Spotted Frog's lower belly and the underside of its hind legs are salmon, orange or yellow, as if painted on; the Wood Frog's are white. B: the Wood Frog has a sharp dark mask through the eye with a white jaw stripe below it; the Columbia Spotted Frog has a pale jaw stripe but no dark mask, and its back carries scattered dark spots, often with pale centres. In Wyoming the Wood Frog lives only in the Medicine Bow Mountains; the Columbia Spotted Frog in the northwest.

Photographs via iNaturalist under Creative Commons licences; the photographers are credited on the sheet.

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