Tasmanian devils are usually solitary, and are nocturnal or crepuscular (twilight) in their habits. So it would make sense that they would seek effectively well hidden dens during the day. They...
Yes and no. Holes in the ground, such as old wombat burrows, are ideal hiding places for nocturnal animals to shelter in during the day. However, the Tasmanian devil is also known to shelter in caves...