Fennec foxes dwell in the sandy Sahara and elsewhere in North Africa. Their nocturnal habits help them deal with the searing heat of the desert environment, and some physical adaptations help as well. Their distinctive, batlike ears radiate body heat and help keep the foxes cool. They also have long, thick hair that insulates them during cold nights and protects them from hot sun during the day. Even the fox's feet are hairy, which helps them perform like snowshoes and protects them from extremely hot sand. The fox's feet are also effective shovels for frequent digging—fennec foxes live in underground dens.