Polar bears are among the most difficult large carnivores to maintain in welfare-positive captivity. Their huge wild ranges, ice-adapted physiology, and the backdrop of their wild counterparts' climate-driven decline make zoo welfare decisions particularly complex.
Polar bear welfare in zoos represents one of the most contested questions in zoo ethics. The species' extraordinary spatial requirements, specialised hunting ecology, and tendency to develop stereotypic pacing even in enriched facilities have led some welfare scientists to argue that no zoo can provide welfare-positive captive conditions for polar bears. Modern zoo facilities with pools, complex terrain, varied enrichment, and cognitive challenge offer substantially better welfare than previous bare enclosures, and stereotypy rates are reduced in well-designed environments. However, even the best zoo exhibits provide a fraction of natural range. The climate crisis adds a layer of complexity — wild polar bears face existential threat, giving captive populations conservation value. Welfare assessment must weigh space restriction against alternative fates. Institutions choosing to maintain polar bears must invest in maximum space, pool access, cognitive enrichment, and rigorous stereotypy monitoring.