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Sheep Frog vs. Western Narrow-mouthed Toad

They live together in the brush and rain pools of extreme southern Texas. A: A thin yellow or orange line down the middle of the back in the Sheep Frog; plain olive to grey, with no line down the back in the Western Narrow-mouthed Toad. B: Brown to reddish, often with dark marks on the sides in the Sheep Frog; pale olive to grey with a few small black dots in the Western Narrow-mouthed Toad. The Sheep Frog has two big spade-like tubercles on each hind foot; its call is a sheep-like bleat ('baaaa'), the narrow-mouthed toad's a buzz like a bee.

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Sheep Frog

Hypopachus variolosus

Western Narrow-mouthed Toad

Gastrophryne olivacea
Sheep Frog vs. Western Narrow-mouthed Toad: comparison sheet with the differences marked

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

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