Aye-ayes, primates in the lemur group threatened by extinction, are seldom displayed in natural history museums. As omnivores, they eat insects and their larvae, as well as fruits, fungi, and nectar. To get to the larvae of longhorn beetles, they tap tree trunks to find hollow chambers and extract the larvae using their elongated third finger. They use a similar technique to crack coconuts: first they tap on the fruit to determine how much milk and fruit flesh it contains. After  gnawing through its hard shell their  elongated finger is used as a spoon to carry the milk and fruit flesh to the aye-aye’s mouth. On display in Hall 39.
© NHM Wien, Lois Lammerhuber