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 Section 7 Range

Section 7 Range Symbol

Wyoming Section 7 Range
Kendall Warm Springs Dace

Potential Distribution in Wyoming

For Species Lists, please use the IPaC System

Section 7 Range

Under Section 7 of the Endangered Species Act of 1973, Federal agencies, or project proponents whose actions have a Federal nexus (e.g., Federal funding, permit, or lease), must consult with the U. S. Fish and Wildlife Service if their actions “may affect” listed species (endangered, threatened, proposed, candidate) or their habitat.  Section 7 species ranges identify those areas on the landscape where agencies or proponents should consider potential effects, both direct and indirect, to the species and their habitat.  These Section 7 species ranges typically encompass larger areas than specific locations where listed species are known to occur.  Project proponents are encouraged to refer to the Service’s Information, Planning, and Conservation System (IPAC) website at http://ecos.fws.gov/ipac/ or to contact the FWS Wyoming Ecological Services Office for additional information http://www.fws.gov/wyominges/ :307-772-2374.  (Section 7 Range boundaries based on the best available data at time of development.  Section 7 Ranges will be updated as new information becomes available.)

Download Section 7 Range GIS Data or Section 7 Range 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: March 21, 2014