The animal often associated with delivering mail is the pigeon, specifically the homing pigeon. Throughout history, these remarkable birds have been used for communication, particularly in wartime and remote areas. Homing pigeons can navigate back to their home lofts over long distances, making them reliable messengers. Their ability to return home, often from hundreds of miles away, has led to their use in various messaging systems and as part of historical war efforts. They are distinguished for their remarkable homing ability.