California Red-legged Frog vs. Foothill Yellow-legged Frog

Both live along streams in the Coast Ranges and Sierra foothills. A: Red in the California Red-legged Frog; yellow in the Foothill Yellow-legged Frog. B: A clear ridge down each side of the back in the California Red-legged Frog; rough, pebbly skin; the ridges faint or missing in the Foothill Yellow-legged Frog. The Foothill Yellow-legged also has a pale triangle on the snout and lives on sunny, rocky streams.

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

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