Elephants are expansive warm blooded animals of the family Elephantidae and the order Proboscidea. They are currently the largest land animal on earth. Two species of elephants exist: Asian and African elephants. Asian elephants are smaller than their African counterparts. African elephants have larger, fan-shaped ears, which some believe actually resemble the shape of the African continent. Elephants are either left or right-tusked and the one they use more is usually smaller because of wear and tear. Elephants have the longest gestation period of any mammal. A single calf is born to a female after a gestation period of 22 months. Amazingly, 16-18 hours of an elephant’s day is spent eating. Elephants eat between 149 and 169 kg (330-375 lb.) of vegetation daily.