Bruneau Hot springsnail (Pyrgulopsis bruneauensis)
Where Listed: WHEREVER FOUND
The tiny Bruneau hot springsnail (Pyrgulopsis bruneauensis) is only about 2 millimeters in size. It is only found in geothermal springs and seeps along an 8-kilometer length of the Bruneau River in Southwest Idaho. It prefers wetted rock faces of springs and flowing water, with large cobbles and boulders. The principal threat to the Bruneau hot springsnail is the reduction and/or elimination of its geothermal habitats as a result of groundwater withdrawal, primarily for agriculture. Spring temperatures are the predominant factor that determines the springsnail's distribution and abundance; the springsnail requires constant springwater temperatures to survive. The Service's 5-year Review for the Bruneau hot springsnail in 2007 concluded that the original listing classification as endangered remains unchanged. The threats that were present at the time of the springsnail's listing remain today. In particular, groundwater levels are not stable or increasing and there is a decline in the number of geothermal springs occupied by the springsnail. Bruneau hot springsnail populations show declining trends, and connectivity between the remaining colonies has been reduced. Current conservation measures are falling short of addressing the highest-ranking threats to the species. Despite previous conservation efforts, threats to the Bruneau hot springsnail persist and it is in danger of extinction. The Service is working with the State of Idaho and other partners in conservation, including private landowners, toward the shared goal of reducing threats and ultimately recovering this species so that it no longer needs protection under the ESA. Conservation actions include efforts to increase and stabilize geothermal water levels. These actions might include: voluntary conservation easements (lease/purchase water rights), irrigation system improvements to reduce agricultural water use, continued monitoring of water levels and snail distribution, control of non-native fish known to prey upon the springsnail, and establishment of regulatory measures that are adequate to permanently protect the springsnail from future groundwater reductions.
- States/US Territories in which the Bruneau Hot springsnail, Wherever found is known to or is believed to occur: Idaho
- US Counties in which the Bruneau Hot springsnail, Wherever found is known to or is believed to occur: View All
|Status||Date Listed||Lead Region||Where Listed|
|01/25/1993||Pacific Region (Region 1)||Wherever found|
» Federal Register Documents
|Date||Title||Plan Action Status||Plan Status|
|09/30/2002||Recovery Plan for the Bruneau Hot Springsnail (Pyrgulopsis bruneauensis)||View Implementation Progress||Final|
|Date||Citation Page||Title||Document Type|
|09/12/1995||60 FR 47339 47340||ETWP; Notice of Availability of Reports and Other Data Pertaining to the Listing of the Bruneau Hot Springsnail||
|02/12/2016||81 FR 7571||Endangered and Threatened Wildlife and Plants; Initiation of 5-Year Status Reviews of 76 Species in Hawaii, Oregon, Washington, Montana, and Idaho||
|12/09/2002||67 FR 72967 72967||Availability of the Recovery Plan for the Bruneau Hot Springsnail (Pyrgulopsis bruneauensis)||
|01/09/2001||66 FR 1688 1689||Availability of a Draft Recovery Plan for the Bruneau Hot Springsnail (Pyrgulopsis bruneauensis) for Review and Comment||
|06/24/2007||Bruneau hot springsnail 5-Year Review|
» Critical Habitat
No critical habitat rules have been published for the Bruneau Hot springsnail.
» Conservation Plans
No conservation plans have been created for Bruneau Hot springsnail.
» Life History
No Life History information has been entered into this system for this species.
» Other Resources
NatureServe Explorer Species Reports -- NatureServe Explorer is a source for authoritative conservation information on more than 50,000 plants, animals and ecological communtities of the U.S and Canada. NatureServe Explorer provides in-depth information on rare and endangered species, but includes common plants and animals too. NatureServe Explorer is a product of NatureServe in collaboration with the Natural Heritage Network.
ITIS Reports -- ITIS (the Integrated Taxonomic Information System) is a source for authoritative taxonomic information on plants, animals, fungi, and microbes of North America and the world.
FWS Digital Media Library -- The U.S. Fish and Wildlife Service's National Digital Library is a searchable collection of selected images, historical artifacts, audio clips, publications, and video.