Sun Bears in Zoos: Welfare of the World's Smallest Bear

Sun bears are the smallest and least-known of the world's bear species. Their welfare in zoos and sanctuaries presents specific challenges and opportunities for conservation.

Key Facts

Sun bears (Helarctos malayanus) are Vulnerable on the IUCN Red List, found only in lowland tropical forests of Southeast Asia.
They are the smallest bear species — adults weigh 25-65 kg — and are highly arboreal, spending significant time in trees.
Sun bears are largely solitary in the wild, though they show tolerance of others at productive food sources.
They have an exceptionally long tongue (up to 25 cm) used for extracting honey and insects from nests.
The primary threats are habitat loss from deforestation and the bear bile trade — sun bears are kept in bile farms alongside moon bears.
The Bornean Sun Bear Conservation Centre (BSBCC) in Sabah, Malaysia rescues and rehabilitates sun bears with the goal of wild release.
Zoo sun bears benefit from complex enclosures with climbing structures, digging areas, and honey-foraging enrichment.

Welfare Considerations

Sun bear welfare is threatened by two distinct captive contexts: bile farming, where they experience extreme chronic suffering in crush cages, and zoo/sanctuary settings, where welfare quality varies enormously. At their best, sun bear sanctuaries provide large naturalistic enclosures, appropriate social management, and the possibility of wild release for rehabilitated individuals. At their worst, zoo sun bears are kept in barren, inappropriate conditions that fail to meet their arboreal and foraging needs. The BSBCC model demonstrates that high-welfare sun bear care with rehabilitation goals is achievable. Zoo sun bears should have access to climbing structures, complex substrates for digging, and feeding enrichment that simulates honey and insect extraction — core behaviors that define their ecological identity.

What You Can Do

Support the Bornean Sun Bear Conservation Centre in their rehabilitation and release program.
Oppose the bear bile trade — pressure governments and companies to end this practice.
Choose palm oil products from certified sustainable sources to reduce deforestation pressure on sun bear habitat.
Support zoos that provide large, complex, naturalistic enclosures for sun bears with appropriate enrichment.
Learn about and share information on sun bear ecology and conservation — they are among the least-known of the world's bears.
Donate to Deramakot forest protection programs and other initiatives preserving lowland Bornean and Sumatran forest.