Beavers also use their tail to warn others of danger by slapping the surface of the water. Beaver store fat in their tail for winter survival. These teeth are beveled so that they are continuously sharpened as the beaver gnaws and chews while feeding, girdling, and cutting trees. Beavers build dams to change their environment more to their liking. Besides humans, only beaver create their own habitat by building dams.
Beavers use whatever materials are available to build dams.
This includes trees, woody bushes, fencing materials, bridge planking, rocks, wire, corn stalks, etc. FOOD Beavers are herbivores. They eat mostly woody plants. They may eat aspen, cottonwood, willow, sweetgum, black gum, black cherry, poplar and pine. Sometimes they eat crops like corn and soybeans.