Domestic pigeons are birds of the family Pigeonidae. Domesticated from the original pigeons. The body is spindle-shaped. The mouth is short and the base is covered with wax. The eyes have eyelids and blink membranes, and the external auditory canal is covered with feathers, so the vision and hearing are very sensitive.
Related information:
1, pigeons are good at flying. Feathers vary in color. Blue-gray is more common, and there are also pure white, dark brown and black and white mixed colors. Short feet are covered with horny scales. They live together and like flying in groups. The incubation period is about 17 ~ 18 days, and males and females hatch eggs alternately.
2. There are many kinds of domestic pigeons, which can be divided into three types according to their uses: book-passing pigeons, meat pigeons and ornamental pigeons. Carrier pigeons have a strong homing ability, can communicate and fly at a speed of 70 kilometers per hour. Pigeons for meat are big and heavy, about 0.8 ~ 1.5 kg, with strong reproductive ability, reaching 10 nest every year, precocious and delicious meat. Decorative pigeon wings have various shapes or unique flying ability.
3. Pigeons' bodies are streamlined, so air resistance can be reduced in flight. Pigeons are covered with feathers, and their forelimbs become wings, giving birth to rows of large and straight feathers. Wings are the flying organs of domestic pigeons. Pigeons need a lot of oxygen when flying, so their respiratory system is developed and their breathing methods are unique.
4. Pigeons not only have developed lungs, but also some air sacs communicating with the lungs. These airbags are located between the internal organs of pigeons, and some of them also extend into the cavities of bones. When a pigeon flies, its wings flap up and down, causing the airbag to expand and contract. Every breath, air passes through the lungs twice, and the lungs have two gas exchanges. Double breathing provides enough oxygen for pigeons.