Sun bears are the smallest and least studied bear species, with specific welfare needs including climbing access, foraging enrichment, and solitary housing management that reflect their arboreal, insectivorous wild lifestyle.
Sun bear welfare in captivity is frequently compromised by facilities designed for larger, more studied bear species. The arboreal dimension of sun bear behaviour — climbing, resting in elevated positions, investigating tree cavities — is often absent in enclosures designed for terrestrial bears. Sun bears denied climbing access show elevated stereotypy and increased aggression. Their insectivorous diet in the wild involves extended foraging for ants, termites, and bee larvae — behaviours that motivate sustained cognitive engagement that cannot be met by static food presentation. Termite mound enrichment, hollow logs with hidden food, and honey dispersed in bark crevices address this foraging motivation. The solitary nature of sun bears makes pair or group housing welfare-risky: bears that appear compatible can shift rapidly to serious aggression without warning. The Sun Bear Conservation Centre in Sabah demonstrates best-practice rehabilitation: large forest enclosures, gradual group introduction with extensive monitoring, and assessment of wild survival skills before release.