Great Plains Narrowmouth Toad - Gastrophryne olivacea
Adult Great Plains Narrowmouth Toad. Photograph by Suzanne L. Collins, The Center for North American Herpetology.
Routes Observed Map: (clickable)
The map does not depict
the actual range of the
Great Plains Narrowmouth Toad in
Small; up to 1.5 inches long; females usually larger than males. Relatively stout body tapers to a narrow, pointed, flattened head. Smooth, tough body skin forms a fold along back of head. Eyes resemble small, black, glass beads. Legs short, forelegs slender when compared to stout, stubby hind legs. No webbing between toes. Dorsal coloration olive-brown, light tan, or grayish, with at least a few dark spots. Distinct bars or blotches usually present across thigh and calf. Underside usually immaculate, but strongly mottled in some Arizona upland populations. Males have dark throat, especially during breeding season. Young have distinctive, dark, leaf-like pattern on back, fading with age.
The male's advertisement call is a buzzy, nasal "waaaaaaaa!", lasting about one to several seconds.