Chihuahuan Green Toad vs. Couch's Spadefoot

Both are green with black markings and both come out to breed in rain pools in the valleys of southeastern Arizona after summer storms. A: Horizontal oval pupil in the Chihuahuan Green Toad; vertical, cat-like pupil in the Couch's Spadefoot. B: Long glands behind the eyes in the Chihuahuan Green Toad; no big glands behind the eyes in the Couch's Spadefoot. C: Small black spots and bars that do not join into a net in the Chihuahuan Green Toad; yellow-green marbled with a black net or blotches in the Couch's Spadefoot. D: No black spade under the hind foot in the Chihuahuan Green Toad; a black, sickle-shaped spade under each hind foot in the Couch's Spadefoot. E: Small: to 2 in (5 cm) in the Chihuahuan Green Toad; bigger and plump: to 3.5 in (9 cm) in the Couch's Spadefoot.

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

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