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Mexican Spadefoot vs. Great Plains Toad

Both breed in the same summer rain pools across southeastern and central Arizona. A: Vertical, cat-like in the Mexican Spadefoot; horizontal in the Great Plains Toad. B: Flat: no crests or boss in the Mexican Spadefoot; crests forming a V between the eyes and a bony hump on the snout in the Great Plains Toad. C: Small dark spots and red-tipped warts in the Mexican Spadefoot; big dark blotches in matching pairs, edged pale in the Great Plains Toad.

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Mexican Spadefoot

Spea multiplicata

Great Plains Toad

Anaxyrus cognatus
Mexican Spadefoot 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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