OK, half of the trunk is missing... the elephant was too close... but I still liked this photo, so I decided to upload it.
African elephant`s ears
The ears are quite large and serve two purposes. The large ear flap can serve as a directional receiver to help the animal to pinpoint the direction of incoming calls. The large veins latticing the back of the ear flap are just under the thin skin and serve as a radiator to dispel heat from the brain and rest of the body (spraying the ears with water increases the cooling effect).