The Sun Bear (Helarctos malayanus) is a bear found primarily in the tropical rainforests of Southeast Asia . The Sun Bear stands approximately 4 ft (1.2 m) in length, making it the smallest member in the bear family. It is often called the dog bear because of its small stature. It has a 2 in (5 cm) tail and on average weighs less than 145 lb (65 kg). Males tend to be slightly larger than females. Unlike other bears, the Sun Bear's fur is short and sleek. This adaptation is probably due to the lowland climates it inhabits. Dark black or brown-black fur covers its body, except on the chest where there is a pale orange-yellow marking in the shape of a horseshoe. Similar colored fur can be found around the muzzle and the eyes. This distinct marking gives the sun bear its name.