Walruses congregate in massive haulouts on beaches and ice, where they are vulnerable to stampede events triggered by aircraft and human disturbance. As Arctic sea ice declines, haulout welfare problems intensify.
Walrus haulout welfare represents a dramatic example of how climate change creates novel welfare emergencies by forcing behavioral adaptations that expose animals to new mortality risks. Walruses evolved to rest on sea ice platforms that distribute individual animals across the ice surface, dramatically reducing the crowding and stampede risk that characterizes land haulouts. As summer sea ice has retreated and disappeared across the walrus range, increasingly large numbers of animals are forced to haul out on the limited beach areas available, creating enormous crowding concentrations that are fundamentally unstable. The trigger sensitivity of these haulouts — where a low-flying aircraft or approaching vessel can trigger a stampede of tens of thousands of animals — means that human activity near haulout sites creates acute welfare emergencies. Individual animals killed in stampedes experience the trauma of the event itself and, for calves separated from mothers during the chaos, starvation risk. Management approaches including strict no-fly zones around major haulouts, observation distance requirements for boats, and community education have reduced human-triggered stampede events in monitored areas.