Compare two species

Sonoran Desert Toad vs. Great Plains Toad

Both breed in rain pools and stock tanks in the desert grassland and farm valleys of central and southern Arizona after summer storms. A: Plain olive to brown, at most a few small dark spots in the Sonoran Desert Toad; big dark blotches in matching pairs, each edged pale in the Great Plains Toad. B: Low crests, no hump on the snout in the Sonoran Desert Toad; crests forming a V between the eyes and meeting in a bony hump on the snout in the Great Plains Toad. C: Smooth and leathery in the Sonoran Desert Toad; warty in the Great Plains Toad. D: Big raised glands on each hind leg in the Sonoran Desert Toad; no leg glands in the Great Plains Toad.

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Sonoran Desert Toad

Incilius alvarius

Great Plains Toad

Anaxyrus cognatus

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

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