Male red fox, or dog, sleeping in the open on the snow, despite a cold drizzle. Note how the fox, well adapted for the cold, wraps his bushy tail around his body to stay warm, and tucks his nose into his fur. Foxes have other adaptations for the cold, including long and thick coats, more fur on their footpads than domestic dogs (for warmth and better grip in snow), and the ability to conserve body heat by reducing circulation to their paws. Their cold-resistant feet, long legs in relation to their bodies, and light builds allow them to move well even in deep snow. Some mammalogists believe the red foxes original to North America, as opposed to their present-day descendants, which may have hybridized with the subspecies introduced from Europe, were restricted to boreal and mountainous regions. This sleepy fox was photographed in the hills of rural Washington, Connecticut.