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DOI/FWS RIN: 1018-AY07 Publication ID: Fall 2011 
Title: ●Endangered and Threatened Wildlife and Plants; Listing Determination and Critical Habitat Designation for Three Sierra Amphibians 
Abstract: We will make a listing determination and designate critical habitat for three Sierra amphibians pursuant to the Endangered Species Act: Yosemite toad (Bufo canorus), mountain yellow-legged frog (Rana muscosa) (Sierra distinct population segment), and Sierra yellow-legged frog (R. sierrae). The first two are on the list of candidates. Twelve-month findings for the two were completed on December 10, 2002 (67 FR 75834), and January 16, 2003 (68 FR 2283), respectively. Subsequently, mountain yellow-legged frog has gone through a taxonomic change and has been split into two separate species; the split-off species is the Sierra yellow-legged frog. We will propose to recognize the new taxonomy and determine the status of all three species. The historic range of Yosemite toad is in the Sierra Nevada Mountains of California, from Alpine County to south of Kaiser Pass in Fresno County. The threats currently facing the Yosemite toad include cattle grazing, timber harvesting, recreation, disease, and the effects of climate change. The other two species inhabit the high-elevation lakes, ponds, and streams in the Sierra Nevada Mountains of California. Predation by introduced trout, disease, and the effects of climate change are the major threats facing both the mountain yellow-legged frog and the Sierra yellow-legged frog. 
Agency: Department of the Interior(DOI)  Priority: Substantive, Nonsignificant 
RIN Status: First time published in the Unified Agenda Agenda Stage of Rulemaking: Proposed Rule Stage 
Major: No  Unfunded Mandates: No 
CFR Citation: 50 CFR 17   
Legal Authority: 16 USC 1531 et seq   
Legal Deadline:  None
Timetable:
Action Date FR Cite
NPRM  10/00/2012    
Regulatory Flexibility Analysis Required: Undetermined  Government Levels Affected: Undetermined 
Federalism: No 
Included in the Regulatory Plan: No 
RIN Data Printed in the FR: No 
Agency Contact:
Sarah Quamme
Chief, Branch of Domestic Listing, Ecological Services Program
Department of the Interior
United States Fish and Wildlife Service
5275 Leesburg Pike, MS: ES,
Falls Church, VA 22041-3803
Phone:703 358-1796
Fax:703 358-1800
Email: sarah_quamme@fws.gov