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Aye-aye
The largest nocturnal primate in the world, the aye-aye is a lemur from Madagascar, characterised by teeth like that of rodents, and a specially thin and long middle finger. It taps on trees for grubs, and gnaws holes in the wood of the trees with its incisors to create small holes. It then inserts its long middle finger into the hole and pulls out grubs. The gremlin-like look is further enhanced by strands of hair here and there, and large eyes.