Golden-mantled tamarin

The golden-mantled tamarin (Leontocebus tripartitus) is a tamarin of the upper Amazon lowlands east of the Andes in Ecuador and northeastern Peru, between the Rio Curaray and the Rio Napo in Peru. Its head is black with a black collar continuous under the throat, the muzzle and sometimes the face are pure white, the neck has a ruff of bright golden to creamy fur, and its underparts are orange. It measures 218 to 240 millimetres from the nose to the base of the tail, and the tail is 316 to 341 millimetres long. It is arboreal and diurnal, ranging through the understory, and forages most actively between 4 and 10 meters above the forest floor, eating mainly fruit, nectar and insects as well as gum from natural holes or holes made by the pygmy marmoset. Its rank has been debated, because field observations suggested it might be a subspecies of the brown-mantled tamarin, but it is currently treated as a separate species of Leontocebus.