
The beavers from the Ice Age didn’t have a flat tail and with time they evolved with one. This leathery tail which grows up to 15 inches long and six inches wide, is used on both lands and in the water. In waters, beavers slap their tail to alarm other beavers in the waters about the potential predators. On the land, beavers use their flat tail to sit straight up. The tail gives them the balance they need while looking for the food.