Wild Caribou Migration Disruption and Welfare

Caribou and reindeer undertake some of the longest terrestrial migrations on Earth, but infrastructure development, climate change, and industrial activity are increasingly disrupting these journeys with serious welfare consequences.

Key Facts

Barren-ground caribou herds such as the Beverly and Qamanirjuaq may travel over 5,000 km annually
Migration routes evolved over millennia to access calving grounds where predator pressure is low and lichen-rich forage is available
Linear infrastructure — roads, pipelines, fences, and seismic lines — creates barriers that deflect and delay migration
Caribou avoid industrial activity corridors up to 5-8 km wide, forcing longer routes through lower-quality habitat
Climate change is altering snow conditions: rain-on-snow events lock forage under ice, causing starvation and reproductive failure
Wolves and bears follow linear corridors, increasing predation pressure on caribou using these routes
Calving ground displacement by industrial development reduces calf survival, the key driver of herd recovery
Some barren-ground caribou herds have declined by 90% or more over the past two decades

Welfare Considerations

Caribou welfare during migration is shaped by access to predictable, high-quality food, low predation risk, and safe calving conditions. When migration routes are deflected by infrastructure, caribou expend greater energy on longer routes and arrive at calving grounds in poorer body condition. Females with lower fat reserves have lower calf survival and reduced milk production, compounding welfare harm across generations. The stress of navigating novel barriers and encountering industrial activity is real and measurable in cortisol and behavioural indicators. Climate variability that makes food availability unpredictable amplifies these stresses. Welfare improvements require landscape-level planning that keeps key migration corridors and calving grounds free of industrial disturbance, and restoration of connectivity where fragmentation has already occurred.

What You Can Do

Support indigenous land rights organisations that advocate for caribou calving ground protections
Advocate for wildlife crossing infrastructure and timing restrictions on industrial activity during calving season
Choose products and companies with commitments to protect boreal and arctic ecosystems
Donate to long-term caribou population monitoring and migration tracking programmes
Engage with climate policy advocacy that addresses the tundra and boreal emissions most relevant to caribou habitat