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πŸ“Š Map Legend

Migration Corridors

Western Population Route (Alaska/Yukon β†’ Mountain West)
Rocky Mountain Corridor (Most Used)
Eastern Population Route (Appalachia β†’ Canada)

Depredation Heat Map

Critical (an estimated 3,400+ sheep/lambs per year, 338+ ranches affected)
High (Documented depredation, multiple incidents)
Moderate (Occasional incidents reported)
Low (Within migration corridor)

Incident Markers

Documented major depredation event
Migration hotspot (high concentration)

Western Migration Corridor

  • Route: Alaska/Yukon β†’ Mountain West
  • Spring: March 4 - May 15
  • Peak: Mid-April
  • Breeding: Alaska, Yukon
  • Wintering: Mountain West

Eastern Migration Corridor

  • Route: Appalachia β†’ Canada
  • Spring: Feb 4 - April 13
  • Breeding: Northeast Canada
  • Wintering: Appalachian Region
  • Population: Smaller, less documented

Top Depredation States

  • Texas: 338 ranches affected
  • Wyoming: an estimated 3,400+ sheep/lambs (2024, USDA NASS)
  • Montana: $48K losses (historical)
  • Colorado: Documented losses
  • Utah: Multiple incidents

Winter Distribution

  • Throughout continental US
  • Concentrated in: West, Midwest, South
  • Prefer areas with less snow
  • Proximity to prey (livestock)
  • Temperature moderation