Polar bear den

view from inside a vacant polar bear den dug into the snow, looking out toward blue sky through the entrance of the den.
Photo By/Credit

USFWS

Media Usage Rights/License
Public Domain
Image
The remains of a polar bear den. While black and brown bears hibernate for several months each year, polar bears den in winter only when pregnant.
Facility
Arctic National Wildlife Refuge
Ecosystem
Tundra
Species
Ursus maritimus
Subject tags
Carnivores
Endangered and/or Threatened species
Marine mammals
Snow
Tundra