• WELCOME
• WHAT'S NEW?
• ABOUT THIS SITE
• BACKGROUND ON BIGHORNS
  • Ranges & Subspecies
  • Devastation & Restoration
  • Importance
• BACKGROUND ON DISEASE PROBLEM
  • Biology of Disease Connection
    • Introduction & Documentation
    • Disease Strains & Infection Factors
    • Disease Transmission Evidence
    • Exclusivity of Domestic Sheep as Fatal Disease Vector
    • Noncommercial Domestic Sheep Threats
    • Vaccine Solution?
  • Bighorn-Domestic Sheep Interaction Policies
    • Introduction & Recognition of Disease Threat
    • Major Policies
    • Regional & Subspecies Trends
    • Federal Agency Trends
    • Hells Canyon, Litigation, & The Payette Decision
    • The Simpson Riders
  • Controversy
    • Introduction
    • Economic Consequences for Sheep Producers
    • Livestock Industry Opposition
    • Controversial Sheep Industry Advocates
    • Skepticism & USFS Counter Statements
• DIE-OFF TABLES
  • Western U.S., Winter 2009-2010
  • Western U.S. & Canada, 1881-2005
  • Western U.S. & Canada, 1900-1995
  • Montana, 1984-2008
• BIBLIOGRAPHIES
  • Scientific Journal Articles
  • Evidence Documents
  • Northern Wild Sheep & Goat Council
  • Desert Bighorn Council
  • Sierra Bighorns & Disease Risk
  • All Site Information
• SEPARATION GUIDELINES
  • Western Association of Fish & Wildlife Agencies (WAFWA)
  • Bureau of Land Management (BLM)
  • U.S. Forest Services (USFS)
• DETAILED DIE-OFF CASE STUDIES
  • Methodology and Analysis
    • Methodology
    • Results Tables
    • Analysis of Case Studies
    • Conclusion and Takeaway Message
  • Case Studies
    • Tobin Range, NV: 1991
    • Aldrich Mountain, OR: 1991
    • Highland/Pioneer Mountains, MT: 1994-1995
    • Tarryall/Kenosha Mountains, CO: 1997-2000
    • Hays Canyon Range, NV: 2007
    • Bonner/West Riverside, MT: 2010
• FREE-RANGE INTERACTION PHOTOS
• MASTER'S THESIS ON BIGHORN-DOMESTIC SHEEP INTERACTION POLICIES
• BIGHORN MANAGEMENT PLANS
• MAPS OF BIGHORN RANGE WITH GRAZING ALLOTMENTS
• WEBSITE LINKS

Western U.S., Winter 2009-2010

INTRODUCTION
This table shows die-offs from one of the deadliest winters for bighorns in the western U.S. Domestic sheep may have caused several of these die-offs.

Click here to download an Excel file of the table below.

REFERENCE
Western Association of Fish and Wildlife Agencies (WAFWA). 2010. Summary on 9 BHS Die-offs in 5 Western States: Winter 2009-10 (June 22, 2010). Cheyenne: WAFWA. http://www.wafwa.org/documents/wswg/Summary9BHSdie-offsin5westernstateswinter 2009-10.pdf (accessed May 17, 2012).