Meet the aye-aye (Daubentonia madagascariensis), a particularly unique lemur that has its own taxonomic family. Dubbed as the weirdest primate in the world, the aye-aye is also the world’s largest nocturnal primate. The lemur spends the night eating and traveling, and sleeps in elaborate nests made of leaves and branches during the day. In local lore, aye-ayes bring bad luck and death and must be killed on sight (ouch). Check World Wildlife’s full piece on the creature here.