Beaver bite marks consist of numerous incisions of smooth surfaces as if made with a chisel. A small-diameter fallen tree is first stripped of its branches and then divided into smaller fragments. Thick trees are most often debarked at the root and left uncut. The beaver effortlessly chews through a branch several centimeters thick and topples trees up to about 70 centimeters in diameter. It is most likely to cut down: willows, poplars, aspens, ash, oaks, and birches. To cut down trees, beavers use their four powerful incisors, covered with a brownish-red enamel. In total, the beaver has 20 teeth. As we look around, we can easily see that beavers can have a strong impact on the environment they inhabit.