

An arctic fox explores fresh snow. David Ponton/Design Pics/Newscom/File
Musk oxen stand with a pair of newborn calves on the central Arctic coastal plain on the north slope of the Brooks Range in Alaska. Steven J. Kazlowksi/Newscom/File
A caribou cow runs with newborn calves in Alaska's Arctic National Wildlife Refuge. Steven J. Kazlowski/Newscom/File
Arctic hares rest in Ellesmere Island, Canada. Newscom/File
A polar bear mother leads her young cubs in Wapusk National Park, Canada. Solent News/Splash News/Newscom/File
An arctic ground squirrel peers over the top of a shrub in Denali National Park, Alaska. Steven J. Kazlowski/Newscom/File
An arctic wolf rests in a snowy enclosure at the Berlin zoo. Patrick Pleul/Newscom/File
The stoat or ermine is also known as the shorttail weasel. Newscom/File
A snowy owl sits on a branch in the zoological garden of Bernburg, Germany. Jens Wolf/Newscom/File
A beluga whale swims in the Russian arctic's White Sea. Andrey Nekasov/VWPICS/Newscom/File