A warm blanket of snow
Snow is a great insulator as it contains about 90% air. The snowflakes’ branches trap the air, slowing the heat transfer process through the snow layer. This phenomenon keeps very cold air outside and warm air inside. This is why some animals in colder climates build snow caves to borrow into for hibernation during winter. Shrews, voles and mice live and store food in spaces under the snow where the temperature is moderate. Squirrels also find temporary shelter when it’s very cold or windy.
