They also feed on oil palms. Nothing is known about their social behavior in the wild, everything that is known about them comes from observation in captivity. Sun bears are kept as pets, but they are often destroyed as they do not make good housepets. Relatively little is known about their reproductive behavior. They are most likely induced ovulators, like most bears.
Male bears have a baculum, or penis bone, like other bears and carnivores.
It is unknown whether they have the delayed implantation of other bears, but it is speculated that they do not since sun bears in captivity have a gestation of 95 days. Their mating season is unknown, and they may not have one as cubs are born year round. Deforestation and human encroachment of course have taken their toll already, and it is unknown how many are left in the wild. No subspecies are known. Ward, Paul and Suzanne Kynaston.