The lowlands tree-kangaroo (Dendrolagus spadix), also spelt "lowland," is a long-tailed, furry, bear-like mammal found only in lowland tropical rainforests on the island of New Guinea (in Papua New Guinea). It is a species of tree-kangaroo (genus Dendrolagus), which are tree-dwelling animals that feed on leaves or other plant matter. Tree-kangaroos are in the macropod family (Macropodidae) with kangaroos, and like other marsupials they carry their young in a pouch. The lowlands tree-kangaroo is threatened by habitat loss.