What is the main difference between a Homing Pigeon and the Pigeons you see hanging around most city parks?
The answer is training. All pigeons are capable of homing, but to be reliable, they need to be trained. You start by taking them a short distance from home and releasing them. As they get used to the process, you take them farther and farther away. Although pigeons are able to find their way home over very long distances, left to themselves, they do not travel far from their homes.