How big are an elephant's ears?
African Elephant's ears are 42 in. (107 cm) in diameter. Indian
elephants have smaller ears.
They keep the elephant cool. Elephants' ears are thin-skinned
and rich in blood vessels. The ears of some African elephants are
nearly 2 meters long and almost as wide, much bigger than those of
Indian elephants. When an African elephant waves its ear flaps, it
can lower the temperature of the blood flowing within them by as
much as 5 degrees Celcius. Indian elephants are essentially
creatures of shady forests. They don't have to endure the high
temperatures that African elephants encounter on their sunburnt
grasslands, so they do not need such large ears.