Couch's Spadefoot vs. Great Plains Toad
Both are blotched, greenish desert amphibians of the Colorado River valley; their records meet there. A: Vertical (cat-eye) in the Couch's Spadefoot; horizontal in the Great Plains Toad. B: Smooth, no crests in the Couch's Spadefoot; l-shaped crests between the eyes in the Great Plains Toad. C: Black marbling on yellow-green in the Couch's Spadefoot; paired dark blotches edged pale in the Great Plains Toad.
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