The Grey Gentle lemur (Hapalemur griseus), which is about the size of a rabbit, lives in holes in trees and only comes out at night. The smallest of the group is the mouse-lemur, with a snub nose and large eyes. The Indris has a closely related nocturnal equivalent the Wooly Indris (Avahi laniger). Oddest and most specialised is the Aye-aye (Daubentonia madagascariensis), an animal the size of an otter, with a black shaggy fur, a bushy tail and large membranous ears. One finger on each hand is enormously elongated and seemingly withered, so that it has become a bony articulated probe. With this the Aye-aye extracts beetlelarvae, its main food, from their holes in rotting wood.