指猴（学名Daubentonia madagascariensis）是马达加斯加特产的一种原猴，是指猴科指猴属的唯一物种。目前已经濒危。

指猴是世界上最小的夜行性灵长目动物，居住在森林中。它们体重大约2.5公斤，雌性比雄性稍轻（100克左右），外表没有太大的区别。指猴的体长约为30-37厘米，尾长为44-53厘米。

成年指猴体毛颜色为黑色或深褐色，颈部为白色。尾巴的形状类似松鼠，脸也比较像啮齿类动物。门牙很大，而且持续生长。这些特征与它们像猴子一样的身体形成鲜明的对比，这也许是为什幺科学家最初将它们归为啮齿类。

The aye-aye (Daubentonia madagascariensis) is a lemur, a strepsirrhine primate native to Madagascar that combines rodent-like teeth that perpetually grow and a special thin middle finger.

It is the world's largest nocturnal primate, and is characterized by its unusual method of finding food; it taps on trees to find grubs, then gnaws holes in the wood using its forward slanting incisors to create a small hole in which it inserts its narrow middle finger to pull the grubs out. This foraging method is called percussive foraging which takes up 5-41% of foraging time. The only other animal species known to find food in this way is the striped possum. From an ecological point of view the aye-aye fills the niche of a woodpecker, as it is capable of penetrating wood to extract the invertebrates within.