The Sulawesi bear cuscus, also known as the Sulawesi bear phalanger (Ailurops ursinus), is a species of arboreal marsupial in the family Phalangeridae that is endemic to Sulawesi and nearby islands in Indonesia. It lives in tropical moist lowland forest at elevations up to 600 m and is diurnal, folivorous and often found in pairs. A. ursinus is threatened by hunting, collection for the pet trade and deforestation. One specimen was observed adopting a raised posture while making short, harsh sounds, alternating between chatter and click sounds. Bear cuscuses can feed on the young leaves of up to 31 different species of plants varying from trees, lianas, and mistletoes. Feeding only amounts to about 5% of their daily activity, compared to about 63% spent on resting.

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