Hurter's Spadefoot vs. Plains Spadefoot

Both have a boss between the eyes; they meet in central Oklahoma and Texas. A: Long, black and sickle-shaped in the Hurter's Spadefoot; short and wedge-shaped in the Plains Spadefoot. B: Olive to greenish, the skin finely warty, often with two pale lyre lines in the Hurter's Spadefoot; grey-brown with dark spots and small orange- or red-tipped warts in the Plains Spadefoot. Calls differ: Hurter's a loud 'waaah' like a young crow, the Plains a short, snoring bleat.

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

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