Poultry is a broad concept including poultry and wild birds. Bird is a narrow concept, which refers to vertebrates with bird characteristics. Birds also belong to birds, and their classification methods and characteristics are different. Birds are widely distributed, including poultry, waterfowl, pigeons, cranes, peacocks and other animals. Birds are vertebrates with wings, beaks and feathers, such as birds, eagles and parrots. In addition, there are many differences between birds and birds in morphology, habits and ecology. Birds have light bones and well-developed pectoral muscles, which are suitable for flying: some birds are good at swimming, while others are suitable for running on the ground.