4. Emu’s third toe
While their inability to fly might seem like a disadvantage, emus (Dromaius novaehollandiae) make up for it with their running abilities. Unlike ostriches, which have only two toes, the emu has three toes – and the extra one makes quite a difference. Having three toes allows an emu to make 180 degree turns at the speed of a cat.
FACT: Just like dogs, emus pant in the heat because they have no sweat glands.
BONUS FACT: While they might not be useful for flying, their wings act as very effective fans.