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Western Toad vs. Great Plains Toad

Both are large toads of open Wyoming country. A: the Western Toad's head has no bony ridges (or very weak ones); the Great Plains Toad's ridges form an L or V behind the eyes and meet in a hard hump (boss) on the snout. B: the Western Toad has a pale stripe down the middle of the back and small dark blotches; the Great Plains Toad has large paired dark blotches, each outlined in pale, and usually only a faint stripe. The Western Toad chirps; the Great Plains Toad gives a long, harsh, deafening trill.

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Western Toad

Anaxyrus boreas

Great Plains Toad

Anaxyrus cognatus
Western Toad vs. Great Plains 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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