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

Both live in southwestern Oregon; the Foothill Yellow-legged on rocky streams, the Red-legged in ponds and quiet water. A: A short, blunt head and snout in the Foothill Yellow-legged Frog; a longer, more pointed head and snout in the Northern Red-legged Frog. B: Rough, pebbly skin; folds faint or missing in the Foothill Yellow-legged Frog; smooth skin; clear folds along the back in the Northern Red-legged Frog. C: A pale triangle on the snout in the Foothill Yellow-legged Frog; a dark mask and pale jaw stripe in the Northern Red-legged Frog. D: Yellow under the hind legs and lower belly in the Foothill Yellow-legged Frog; red under the hind legs in the Northern Red-legged Frog.

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

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