Wild Moose Social Behavior and Winter Welfare

Moose are the largest members of the deer family and face unique welfare challenges in winter landscapes shaped by climate change.

Key Facts

Adult moose can weigh up to 700 kg; bulls grow the largest antlers of any living deer species
Moose are largely solitary outside of breeding season, unlike many other deer species
Winter tick infestations can cause moose to lose up to 70% of their hair, leading to death from cold
Moose are highly sensitive to heat and begin to show heat stress at temperatures above 14°C (57°F)
Brainworm, a parasitic nematode spread by white-tailed deer, is fatal to moose
Climate change is expanding white-tailed deer range northward, bringing brainworm into moose territory

Welfare Considerations

Moose are suffering increasingly from two converging welfare crises: winter tick infestations and brainworm infections, both exacerbated by climate change. A heavily tick-infested moose may spend so much energy grooming that it neglects feeding, entering spring critically weakened. Brainworm causes progressive neurological decline — infected moose become disoriented, lose their fear of humans, and waste away over weeks or months. These are prolonged, painful deaths. Habitat management that limits deer-moose overlap and maintains cold winters that kill ticks can help, but require landscape-scale action.

What You Can Do

Support climate action policies that slow the warming driving tick and deer range expansion
Advocate for wildlife management that accounts for brainworm dynamics in moose range
If you encounter a disoriented or unusually approachable moose, contact wildlife authorities
Donate to moose research programs studying tick and parasite management strategies
Follow local hunting regulations carefully — overharvest compounds climate-driven moose declines