Watch Rare Video of Bats Hibernating in Snow Dens | Nat Geo Wild

Ussurian tube-nosed bats spend the coldest months in snow-covered dens—the only mammal species known to do so besides polar bears. ➡ Subscribe: About National Geographic Wild: National Geographic Wild is a place for all things animals and for animal-lovers alike. Take a journey through the animal kingdom with us and discover things you never knew before, or rediscover your favorite animals! Get More National Geographic Wild: Official Site: Facebook: Twitter: Instagram: A surprising creature lies inside these snow holes in Japan. The golf ball-sized fur balls are Ussurian tube-nosed bats. Scientists have determined that the bats hibernate in snow dens—the only known mammal to do so, besides polar bears. But, unlike polar bears, these bats are not insulated by heavy fur and fat layers. To survive winter, the tiny mammals drastically lower their body temperatures and heart