A Carrier pigeon is a bree of Homing Pigeon (specifically a domesticated Rock Pigeon, Columba livia) that has been used to carry messages. Using pigeons to carry messages is generally called "pigeon post." Most homing/racing type varieties can be used to carry messages. There is no specific breed actually called "Carrier pigeon," so a Carrier pigeon is basically any variety that is used to carry messages. Carrier pigeons that were the basic Racing Homer were used to carry messages in World War I and World War II and are nowadays used for pigeon racing. Thirty-two pigeons were presented with the Dickin Medal.