A larkin is a rare creature, about as big as a palm, which can absorb Stormlight from people. It looks something like a cremling, but with wings that fold out of its back, eyes of solid silver, and a snout and mouth reminiscent of an axehound's.
Though they were supposed to have died with the scouring of Aimia, they now remain endangered. However, even their corpses bring a fortune in trade.
Elhokar Kholin has the corpse of a larkin trapped inside a block of crystal in his conference room in the Pinnacle which he uses as a paperweight.