Photo of the Day 4 September 2007

Canada, 2004
Photograph by Norbert Rosing
An arctic fox pup awakens from a nap on the summer-greened Canadian tundra.

Most arctic foxes turn white in winter to blend with their snowy surroundings, though some, called blue foxes, wear a brownish-blue coat. These delicate-looking mammals have adapted a host of physical attributes—short ears; a short muzzle; thick fur—to help them bear up under some of Earth's harshest living conditions.