Look at this sleeping beauty in our Sleeping Fox Sticker. These animals in the wild curl up in a ball out in the open to sleep, retaining warmth by covering themselves with their bushy tails. Most foxes in the wild are nocturnal and sleep during the day. By the way, they can wake up several times if they hear other animals or unfamiliar sounds. Also, foxes sleep near their dens, preferring to sleep out in the open, near brush, or under a ledge or uprooted tree curled up in a ball with their backs to the wind and their noses tucked under their tails.