 Although it uses 50% of its stored fat over the course of a day, over 80% of its energy comes directly from the simple sugars that compose its diet of nectar, without being stored in any form.A 2013 study determined that their tongues have a mopping ability that is powered by blood, a phenomenon unique in nature.Elongated hairs at the tongue's tip, which normally lie flat, become engorged with blood when the tongue is protruded.