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Sonoran Desert Toad vs. Red-spotted Toad

Both live in the deserts and canyons of southern and central Arizona, around springs, stock tanks and washes. A: Long and kidney-shaped, far bigger than the eye in the Sonoran Desert Toad; small and ROUND, about the size of the eye in the Red-spotted Toad. B: Smooth and leathery, olive to brown in the Sonoran Desert Toad; pale grey to tan, with small red or orange-tipped warts in the Red-spotted Toad. C: Big raised glands on each hind leg in the Sonoran Desert Toad; no leg glands in the Red-spotted Toad. D: A white wart at the corner of the jaw in the Sonoran Desert Toad; no white wart in the Red-spotted Toad. E: Huge and heavy: to 7.5 in in the Sonoran Desert Toad; small and flat: to 3 in in the Red-spotted Toad.

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Sonoran Desert Toad

Incilius alvarius

Red-spotted Toad

Anaxyrus punctatus
Sonoran Desert Toad vs. Red-spotted 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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