What are the characteristics of good pigeons

The directional pigeons usually tighten the nose, and the back end is closer to the front brain. There is a deep gap in the middle.For pigeons, direction is natural ability, but can also be trained.The training method is very simple. It is based on the loft, and is released in eight directions such as east, south, southeast, southwest, northeast, and northwest of the east, south, southeast, southwest, northeast, and northwest.