Great Basin Spadefoot vs. Plains Spadefoot
Two spadefoots with vertical pupils and a black spade on each hind foot; they are hard to tell apart and their ranges meet in Wyoming and Montana. A and B: both have a boss between the eyes, but in the Plains Spadefoot it is hard and bony, standing up as a distinct hump in adults; in the Great Basin Spadefoot it is soft and glandular, a lower swelling. Colour and warts vary in both. The Great Basin Spadefoot is found in the sagebrush basins of the southwest; the Plains Spadefoot over much of the state. Calls differ only slightly.
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