Research shows that this colorful bird uses its massive beak to rapidly radiate away heat, allowing it to chill out in tropical climates or when expending a lot of energy while flying. At its most efficient, the toucan is theoretically capable of jettisoning 100% of its overall body heat loss through its bill.

Birds don’t sweat. Neither do elephants or rabbits. Instead, these creatures flush an uninsulated body part–such as a beak or an ear–with blood and let the heat dissipate into the air.