Wyoming Ecological Services
Mountain-Prairie Region

Federally Listed, Proposed & Candidate Species | Species of Concern | Migratory Birds | All Species By County



Federally Listed, Proposed and Candidate Species


Wyoming Toad
(Bufo baxteri)

Status: Endangered

Wyoming ToadPhoto Credit: FWS


Wyoming Toad Area Of Influence

Section 7 Range Symbol

Wyoming Area Of Influence
Wyoming Toad

Potential Distribution in Wyoming

For Species Lists, please use the IPaC System

Area Of Influence

Areas Of Influence (AOI) identify areas where any project located within should consider potential effects to the Threatened, Endangered, Proposed, and Candidate species and designated and proposed Critical Habitat, in reference to Section 7 of the Endangered Species Act of 1973, as amended.  AOI typically encompass larger areas than simply where the species is known to exist because of direct and indirect effects to the species and their habitat.  It is important to consider potential effects to the species and their habitat within these larger areas.  Action agencies are encouraged to refer to the Service’s Information, Planning, and Conservation System (IPAC) or contact the FWS Wyoming Ecological Services Office for additional information.  (AOI boundaries based on the best available data at time of development.  AOI will be updated as new information becomes available).

Download Area Of Influence GIS Data or Area Of Influence Google Earth layers


Species Information

The Wyoming toad (Bufo (Anaxyrus) baxteri) historically occupied flood plains, ponds, and seepage lakes associated with shortgrass communities occurring between 7,000 and 7,500 feet in elevation in the Laramie Basin.  The toad was associated with both the Big and Little Laramie Rivers.  Populations of the Wyoming toad suffered a dramatic decline in the 1970s and the current distribution is limited to Mortenson Lake National Wildlife Refuge and possibly Hutton Lake National Wildlife Refuge.  The Service recommends surveys when a proposed project will occur within 1-mile of Mortenson Lake or Hutton Lake National Wildlife Refuges.  These guidelines may change as new sites for Wyoming toad populations are established.

Last updated: April 10, 2015