The hairy-eared dwarf lemur (Allocebus trichotis), or hairy-eared mouse lemur, is a nocturnal lemur endemic to Madagascar. It is the only member of the genus Allocebus. It was originally named by Gunter in 1875 as Cheirogaleus trichotis as part of the Cheirogaleidae family, or the dwarf lemurs. However, in 1967 the hairy-ear lemur was assigned its own genus by Petter-Rousseaux and Petter. This species is likely to be critically endangered and the population is estimated at 100–1000 individuals. Field research suggests distribution of the animal seems to be patchy and restrictive and they all live in a single location in the northeastern part of the country. Hairy-eared dwarf lemurs build leafy nests within trees to hibernate in. Their diet consists mostly of fruit, tree sap, and insects.