In order to keep warm during the winter, caribou have two layers of insulating fur. This fur, while warm is completely hollow. Their buoyant hairs, wide hooves, and strong legs help them to swim as fast as 6 miles per hour. Caribou have large, almost suction cup like hooves that spread widely to support the animal in snow and soft tundra, similar to snowshoes. While swimming, the hooves can also serve as a paddle. Additionally, their hollowed out hooves serve as scoops to move snow in search of lichen to munch on. Over time, the edges of their hooves become sharp, ideal for walking on ice. Caribou migrate between a winter range and a summer range throughout the year and can log up to 2000 miles per year! Bering Land Bridge is part of the winter range for the Western Arctic Caribou Herd. Lucky for them, their hooves were made for the journey!