Great Plains Toad
A medium-sized toad with large, dark brown or green, paired blotches on the back and sides. Each blotch is usually encircled with white or light tan and contains many warts. Unlike other true toads in Missouri, the Great Plains toad has a raised hump (known as a “boss”) between the eyes. The belly is cream-colored with little or no spotting. Makes a loud, rapid, piercing, metallic, chugging sound—"chee-ga, chee-ga, chee-ga"—that lasts 20-50 seconds. The inflated vocal sac of calling males is sausage-shaped and extends forward and above the snout.