The aye-aye has long, crooked fingers with big claws.
British Dictionary definitions for aye-aye
a rare nocturnal arboreal prosimian primate of Madagascar, Daubentonia madagascariensis, related to the lemurs: family Daubentoniidae. It has long bony fingers and rodent-like incisor teeth adapted for feeding on insect larvae and bamboo pith
C18: from French, from Malagasy aiay, probably of imitative origin