Do elephants sweat?
Because the elephant´s skin does not have perspiratory glands, the elephants have to cool themselves in another way.
They have great ears working like coolers. Behind the ears, under the fine skin, run thousands of very fine veins. When the elephants flutter with the ears, the draught cools the capillary vessel blood and thus the body. This has the same effect as when a dog hackles or when we, in great heat, hold our wrists in cold water. Fluttering with the ears is very efficient for elephants.