Polar bears are among the most challenging animals to house humanely in zoos, with their specialised physiology, large ranging requirements, and hunting ecology creating welfare problems in most zoo environments.
The welfare case against polar bear exhibits in standard zoo environments is among the strongest for any commonly displayed species. The mismatch between what polar bears evolved to need — vast sea ice, cold temperatures, seal hunting, near-solitude — and what zoos can provide is fundamental and largely unbridgeable. Stereotypic pacing, documented in the large majority of zoo polar bears, reflects profound spatial frustration in animals whose entire physiology is calibrated for long-distance movement. Heat stress in summer months adds physiological discomfort. The conservation rationale for zoo polar bears is also weak: polar bears are unlikely to be reintroduced to the wild, and the primary threat — Arctic sea ice loss from climate change — is not addressed by zoo breeding programmes. Some welfare advocates argue that polar bear exhibition cannot be justified under contemporary welfare standards, and that existing zoo polar bears should be transferred to large sanctuary facilities in appropriate climates.