How long can swallows live?

The average life span of swallows is about ten years. The following is some knowledge about swallows, which I hope will help you: Swallows belong to passerine 1 genus. This genus of birds is small in size, with a body length of130 ~180 mm. The wing tip is long and the tail is forked. Most of the feathers on the back are blue-black, so they were called mysterious birds in ancient times. The wing tip is long and good at flying, the mouth is short and weak, and the mouth is wide, which is a typical mouth shape of insect-eating birds. Short feet and strong claws. There are 20 species in the world and 4 species in China, among which domestic swallow and Jin Yan are more common. Swallows are chestnut red in the front waist, with irregular horizontal bands in the back chest and milky white in the abdomen. Swallows usually breed from April to July. Domestic swallows nest under the eaves of farmhouses. The nest is made of saliva bonded with soil and grass stalks, covered with soft weeds, feathers, rags and so on. And some Artemisia annua leaves. The bird's nest is dish-shaped. Breeding 2 nests every year, mostly from May to early June and from mid-June to early July. Each nest lays 4 ~ 6 eggs. The second nest is less, 2 ~ 5 pieces. Eggs are milky white. Males and females hatch eggs together. 14- 15 days, chicks hatch and parents eat together. The chicks fly out in about 20 days, and then feed them for 5 ~ 6 days, so they can feed themselves. The food is full of insects. The golden waist swallow is similar in shape to the domestic swallow, but slightly larger. This swallow has a chestnut waist, which is very eye-catching, and a small black line in the lower body, which is easy to distinguish from domestic swallows. Habits are similar to those of domestic swallows, but most of them live in mountain villages. Yan is a typical migratory bird. After the breeding, the young birds still follow the adult activities and gradually integrate into the large group. Before the arrival of the first cold wave, the swallows that migrated to the south for the winter were divided into Swift, Louyan, Domestic Swallows and Swallows. Different swallows have different living habits. For example, swallows and swifts belong to climbing birds, while domestic swallows and golden swallows belong to songbirds. Different kinds of swallows have different shapes. Lou Yan is bigger, flying high, flying fast, black all over, metallic and singing loudly. It likes to nest under the high eaves of pavilions and ancient buildings. Domestic swallows are small, with metallic black hair, chestnut head, white or pale pink abdomen, low flying and low singing. They are mostly on the indoor beams and corner nests of residents, and they like to be close to human beings. They mainly feed on mosquitoes, flies and other insects. They are well-known beneficial birds, and they have the habit of protecting swallows in the mass era. When the autumn wind is bleak and the leaves fall, swallows fly to the south in droves, and then fly back to the original place when the flowers bloom and the willows shoot in the next spring. Yan will come back at this time every year. Swift is the fastest bird. It often preys on insects in the air, with long wings and weak legs. Swifts are widely distributed, often breeding in high latitudes and wintering in tropical areas. There are 80 species belonging to 18 genus and 7 species belonging to 4 genera in China.