Many friends who have lived in the countryside have probably seen swallows enter the house to build nests. However, the nesting of swallows is not easy. Just like human beings choose housing, not all lots will be satisfied. So, how do swallows judge when choosing a house to nest?
Swallow, as a typical migratory bird, began a long-distance migration from north to south in June+10/October, 5438, and flew to south China and even South Asia to spend the winter. After the weather in the north gradually warmed up in February next year, it returned from the south one after another, and finally spread all over the country in April, and then entered the breeding season. Young birds grow up slowly under the feeding of adult birds, and follow the adult activities to complete the population growth and the replacement of new and old individuals.
Swallows are in the north, and the nest is mainly used for breeding young birds and for individuals to inhabit; In the south, the function of bird's nest is relatively simple, and it is usually only for individuals to rest. But no matter where the bird's nest is built, it must meet the most basic conditions, that is, to provide a safe, comfortable and quiet place with sufficient food sources around. Therefore, for the two kinds of swallows most closely related to human beings-domestic swallows and golden-waisted swallows-their first choice is the corner inside the house and under the eaves.
The ancients often said; There is no scientific reason why swallows don't enter the door of poor people's homes. Swallows have no ability to judge whether a family is rich or not. They can only judge whether they meet the most basic conditions mentioned just now according to the structure and existing conditions of the house, such as safety, comfort, quietness and sufficient food sources around them.
From a security point of view,
The corners and eaves of the house are ideal shelters, where they will neither suffer from strong wind and rain nor be exposed to the sun. In addition, there are few natural enemies in these places, which are not easy to be found by natural enemies.
From the point of view of comfort,
In and around rural houses, there is generally no serious pollution problem, no strong light, no irritating gas and no toxic and harmful substances. In addition, the house itself will have a certain thermal insulation function, and the temperature of bird's nest will be greatly guaranteed.
From a quiet point of view,
Swallows are quiet animals, especially in breeding season. They don't like the noisy environment in the stages of spawning, hatching, feeding and rest of swallows, otherwise it is not conducive to the growth of larvae and the health of adults. Generally, the probability of noise interference in the house and under the eaves is small.
From the point of view of food source,
Around rural houses, there are usually patches of trees and fields, where there are a lot of insects for swallows to catch and eat, such as mosquitoes, flies, caterpillars and so on. Swallows can catch food in a short time without flying far, which is of great significance for quickly replenishing body energy and feeding young birds efficiently.
Although rural houses meet the selection criteria of swallows, not all houses and families meet the site selection conditions of swallows. In a sense, the swallow is right; The matter of settling down is still quite picky.
For example, the courtyard is messy and the house is damp. It is uncomfortable to live; There are big trees in the yard or at the door, which is not convenient to fly in and out. The owner of the house doesn't like birds and is used to disturbing and driving away swallows, which greatly threatens his own safety; Swallows don't consider people who often hold parties and entertainment activities in their houses, have powerful electrical appliances and instruments, and are surrounded by factories and workshops that produce gas, water pollution or noise. In addition, if the house is far away from the Woods or fields, and wine and pesticides are often sprayed in the Woods and fields, swallows generally do not choose. Even if they barely build a nest, they will leave soon.
Therefore, the ancients regarded swallow nesting as a good omen, which was essentially a spiritual sustenance and good hope for beneficial birds. Swallow's choice of nest house is entirely instinctive, and it is a natural judgment from the perspective of comprehensive safety and comfort, which is conducive to the survival and development of individuals and young birds. However, all the houses that swallows choose to nest are generally clean, tidy, quiet and peaceful, and the owners of the houses are usually calm and friendly to others.