Anaxyrus baxteri (Porter, 1968)
© 2009 Endangered Species International (1 of 1)
Distribution and Habitat
Country distribution from AmphibiaWeb's database: United States
U.S. state distribution from AmphibiaWeb's database: Wyoming
Life History, Abundance, Activity, and Special Behaviors
Trends and Threats
Local and broad scale population declines are due to depredation, mostly due to introduced predators. Recent investigations involving implanted radio transmitters suggested predator attack primarily from mustelids (Parker 2000). Still, it is not often that naturally occurring predator-prey relationships are the cause of extinction of an entire population.
The original decline may be due to a chytrid fungus, Batrachochytrium dendrobatidis, which has been implicated in amphibian declines worldwide. The current population at Mortenson Lake is infected with the fungus, and has been since 1989 (USFWS 2000).
Translocation results on A. baxteri is discouraging (Seigel 2001).
Possible reasons for amphibian decline
Hear calls at the Western Sound Archive.
Baxter, G.T. and Stone, M.D. (1980). Amphibians and Reptiles of Wyoming. Wyoming Game and Fish Department, Cheyenne, WY.
Parker, J., Anderson, S., and Lindzey, F. (2000). ''Bufo baxteri (Wyoming Toad). Predation.'' Herpetological Review, 31(3), 167-168.
Seigel, R. A. and Dodd, C.K., Jr. (2001). ''Translocations of amphibians: proven management method or experimental technique?'' Conservation Biology, 16(2), 552-554.
Stebbins, R. C. (2003). Western Reptiles and Amphibians, Third Edition. Houghton Mifflin, Boston.
US Fish and Wildlife Service (USFWS) (2002). Wyoming Field Office Annual Wyoming Toad Report FY 02.
Originally submitted by: Kenny D'Oyen (first posted 2004-02-20)
Edited by: Tate Tunstall, Michelle S. Koo (2012-04-29)
Species Account Citation: AmphibiaWeb 2012 Anaxyrus baxteri: Wyoming Toad <https://amphibiaweb.org/species/114> University of California, Berkeley, CA, USA. Accessed Apr 2, 2023.
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Citation: AmphibiaWeb. 2023. <https://amphibiaweb.org> University of California, Berkeley, CA, USA. Accessed 2 Apr 2023.
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