Are Yanzi and Swallow Animals?

Goose is a general term for wild goose birds, which is characterized by large size, high mouth base, almost the same length as the head, strong odontoid process at the edge of the upper mouth and strong mouth armor, accounting for all of the upper mouth. The neck is thick and short, the wings are long and sharp, and the tail feather is generally 16- 18. Most body feathers are brown, gray or white. * * * There are 9 species in the world and 7 species in China. In addition to white geese, there are also common geese, such as red geese, bean geese, bantou geese and gray geese, which are commonly known as "geese" among the people. The wild goose is one of the well-known birds. When migrating, dozens, hundreds or even thousands of geese always gather together and fly in a line with each other. The ancients called them "strict array". The "Yan Zhen" was led by the experienced "Touyan". When speeding up the flight, the team is arranged in a "human" shape. Once it slows down, the queue changes from "human" to "one", which is an effective measure for long-distance migration. When the wings of the "Touyan" flying in front pass through the air, there will be a weak updraft at the tip of the wing, and the people behind can use this airflow in turn, thus saving physical strength. However, "Touyan" is prone to fatigue because there is no weak updraft available, so in the process of long-distance migration, geese need to change their formations frequently and replace "Touyan". Their movements are very regular, sometimes flying, sometimes singing, and constantly calling "Yi, Yi". Migration usually takes place at dusk or at night. During the trip, people often choose lakes and other large waters to rest and look for fish, shrimp, aquatic plants and other foods. Each migration takes about 1-2 months, and there are many hardships on the way. But they go north in spring and south in autumn and never break their word. No matter where you breed and spend the winter, you always go north and south on time. In ancient China, there were many poems praising them, such as "On the first day of August, geese opened and flew south with frost." Lu You's "Rain Ji Chicken Live Early, the wind is high and the array is oblique"; Wei's "Wan Li people go south, three spring geese fly north" (singing geese in the south), "Red Rock on a moonlit night in Meng Chun, Red Rock on a moonlit night in Qiu Meng", "Lv Chunqiu" and so on.

Swallows belong to passeriformes 1 genus. This genus of birds is relatively small, with a body length of 13 ~ 18 cm. The wing tip is long and the tail is forked. Most of the feathers on the back are bluish-black, so in ancient times,

It's called blackbird. 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 more than 20 species in the world, such as Louyan, White-waisted Swift, Domestic Swallow, Swallow, Grey Sand Swallow, Golden Swallow and Maojiao Swallow, and there are 4 species in China, among which Domestic Swallow and Golden Swallow are more common. 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. Most of them nest in indoor beams and corners of households and like to be close to humans. 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. Chickens fly out in about 20 days and are fed for 5-6 days.

You can support yourself. 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 obvious and striking. There is a small black line on the lower body, which is easy to be at home.

Swallows are different. 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, gradually integrate into the large group, and move south for the winter before the first cold wave comes.

Swallows are birds that are beneficial to human beings. It mainly feeds on mosquitoes, flies and other insects. It can eat 250,000 insects in a few months, so we can't hurt it. In the autumn before winter, swallows always travel long distances every year-they fly from the north to the far south in droves, where they can enjoy warm sunshine and humid weather, and leave the frost and cold wind of winter to tits, grouse and Thunderbirds who never fly south for winter. On the surface, it is the cold winter in the north that makes swallows leave their hometown for the winter in the south, and then return to their hometown to have children and live and work in peace and contentment in the warm spring in bloom. Is that really the case? Actually, it is not. It turns out that swallows feed on insects and have always been used to preying on flying insects in the air, but they are not good at searching for insect food in cracks in trees and ground. They can't omnivore berries and seeds like rubber grouse and Thunderbird, and they can't eat leaves in winter (conifers don't lose their leaves even in winter). But in winter in the north, there are no flying insects for swallows to prey on, and swallows can't dig the larvae, pupae and eggs of hidden insects such as woodpeckers and woodfinches. The lack of food makes swallows migrate from north to south every year in order to obtain a broader living space. Swallows have become "nomads" in the bird family.