Average body size and minimum adult size vary geographically. Although the throat, chest, and lower sides may be mottled, the abdomen is not. The dorsum is olive or tan in color, and may be marked with scattered black spots or plain. The toes are not webbed, and their tips are rounded and tapered. There is a single metatarsal tubercle on each hind foot (Nelson 1963).
Distribution and Habitat
Country distribution from AmphibiaWeb's database: Mexico, United States
U.S. state distribution from AmphibiaWeb's database: Arizona, Colorado, Kansas, Missouri, Nebraska, New Mexico, Oklahoma, Texas
The range of Gastrophryne olivacea extends from extreme southern Nebraska and western Missouri southwards through most of Kansas, Oklahoma, and Texas to the Mexican Plateau and along the Pacific lowlands of Mexico south to Nayarit. It reaches an elevation of about 4,100 feet in Arizona.
Hear calls at the Western Sound Archive.
Nelson, C. E. (1963). ''Gastrophyrne olivacea (Hallowell). Western Narrow-mouthed Toad.'' Catalogue of American Amphibians and Reptiles. American Society of Ichthyologists and Herpetologists, 122.1-122.4.
Originally submitted by: Franziska Sandmeier (first posted 2001-02-09)
Edited by: Michelle S. Koo (2012-04-29)
Species Account Citation: AmphibiaWeb 2012 Gastrophryne olivacea: Great Plains Narrow-mouthed Toad <https://amphibiaweb.org/species/2124> University of California, Berkeley, CA, USA. Accessed Oct 4, 2023.
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Citation: AmphibiaWeb. 2023. <https://amphibiaweb.org> University of California, Berkeley, CA, USA. Accessed 4 Oct 2023.
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