Researchers reveal secret of aye-ayes’ long middle finger

Video shows captive Madagascan primates using elongated finger to pick nose and eat the mucus

With its big eyes, bushy tail and sensitive ears, the aye-aye may appear a cute, if quirky, creature. But now researchers have discovered it has a less endearing trait: it uses its long middle finger to pick its nose - and eat the mucus.

Aye-ayes are - like humans - primates, but they are nocturnal, endangered and only found in Madagascar. An object of superstition, they have a number of unusual features, including rodent-like teeth and a skinny, elongated finger with a ball-and-socket joint.