What is the function of a swallow's tail? What do you usually eat? How do you build a nest?

Swallow is a common small bird. The idiom "light as a swallow" also comes from this bird. Swallows have a slender body, with metallic feathers, very beautiful. Swallows are very flexible and are typically beneficial birds. In rural areas, swallows are often seen building their nests on roofs, corridors and eaves. We often say that swallows 'tails are like scissors, so what is the use of swallows' tails? What do you usually eat? How do they build nests?

What is the purpose of the swallow's tail?

Swallow tail is mainly able to maintain body balance, grasp the direction of flight, control the rise and fall, adjust the flow of air role.

The swallow tail is shaped like scissors, which can better assist its flight and improve its flight speed, especially when turning in the air, which can effectively reduce the resistance of the air and make the body very flexible, because the shape of the scissors is streamlined.

A nest of swallows eats a lot of food, so only when the flight speed is increased and the flight is more stable can the swallow mother and father catch more food, which is also a phenomenon formed in the long evolution.

What do swallows usually eat?

The swallow's main food is insects. Only a few species of swallows will consume plant food, and only a small amount will be consumed. For example, the two-colored tree swallow will often eat plant food, similar to berries, etc. Of course, this is only the second choice in the absence of insects.

Swallows don't fly aimlessly for food, nor do they open their mouths to wait for plankton in the air, as we see them. They'll strike out, they'll strike out. Swallows adjust to the food in winter areas.

If you raise swallows, you can go to the fields to catch grasshoppers, buy red daphnids, etc., or you can go to the flower and bird market to buy small insects that specifically raise birds.

How do swallows build nests?

Swallows nest, then usually choose no wind and rain eaves, walls can not be too smooth, general cement walls, earthen brick walls are their favorite. If there are some convenient nesting objects on the wall, such as lamp holders and window bars, they are very attractive.

After choosing the nesting site, it is necessary to start using the mouth to hold mud. They were mainly brought back from paddy fields, rivers and other places not too far away, mixed with swallow saliva, and built their nests bit by bit. It will also be mixed with some straw, feathers, etc., to make the whole look stronger. It seems to be a very simple thing, but it is also like building a house, one step at a time, otherwise it is easy to collapse. Although their bodies are small, in order to have a stable home for themselves, the energy is indeed great.