What is the mysterious homecoming bird in the Millennium?

In the Millennium season, the mysterious bird is a swallow.

1. Classification and characteristics of swallows:

Classification of families and genera: Swallows belong to passeriformes and Phallidae. Swallow family includes many species, such as home swallow, brown-throated swallow, red-throated swallow and rock swallow.

Appearance characteristics: Swallows are usually slender, with slender wings and a tail. Their heads are small and sharp, and their mouths are flat, which is suitable for catching flying insects. Swallow feathers often show bright colors such as blue, black and white, which has a unique aesthetic feeling.

2. Swallow's living habits:

Food: Swallows mainly feed on flying insects, such as mosquitoes, moths and flying ants. They catch prey with superb flying skills and keen eyesight.

Breeding: Swallows are migratory birds and often come to the breeding ground in spring. They take nests as their home and like to nest in buildings, cliffs, caves and other places. Bird's nest is made of soil and saliva, which is strong and durable. Both men and women are involved in hatching and brooding.

Migration: Some swallows migrate, usually flying to the south in cold winter, looking for a warmer climate.

3. The symbol of swallows in culture:

Swallows have special symbolic meanings in different cultures. It is usually regarded as a symbol of luck and auspiciousness, representing family reunion and happiness. In China culture, swallows are also regarded as a symbol of happy marriage, which means "Swallows in pairs".

4. Protect swallows:

Due to the development of urbanization and environmental pollution, some swallow populations are threatened. Therefore, protecting swallows has become an important environmental protection task. People advise not to use harmful pesticides at home to maintain the food chain of swallows.