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


Kendall Warm Springs Dace
(Rhinichthys osculus thermalis)

Status: Endangered



Kendall Warm Springs Dace Area Of Influence

Section 7 Range Symbol

Wyoming Area Of Influence
Kendall Warm Springs Dace

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 Kendall Warm Springs dace (Rhinichthys osculus thermalis) is listed as endangered under the ESA.  This species only occurs in Kendall Warm Springs--a series of small thermal springs and seeps approximately 984 feet in length, which feed into the Green River in Sublette County, Wyoming.  A 10-foot high waterfall forms a barrier to fish movement into Kendall Warm Springs from the Green River.  Adult Kendall Warm Springs dace average in size from 1 to 2 inches.  The potential threats to the Kendall Warm Springs dace include:  (1) water table lowering or contamination in the area surrounding the Kendall Warm Springs, (2) potential collection of individuals, (3) introduction of exotic aquatic species into Kendall Warm Springs, and (4) destruction of riparian streamside vegetation or in-stream habitat.  Management objectives for the recovery of this species are to maintain the existing population, begin a captive breeding program, and protect the dace’s habitat.


Additional Information

Last updated: April 10, 2015