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Compare two species

Western Spadefoot vs. Great Basin Spadefoot

Their records meet at the edges of the Sierra Nevada and in a few valleys where the two ranges touch. A: Flat: no raised boss in the Western Spadefoot; a low, soft boss (bump) between the eyes in the Great Basin Spadefoot. Range decides elsewhere: west of the Sierra Nevada and the deserts (Western) vs the Great Basin east of it.

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Western Spadefoot

Spea hammondii

Great Basin Spadefoot

Spea intermontana
Western Spadefoot vs. Great Basin Spadefoot: comparison sheet with the differences marked

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

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