1, chestnut red feathers on forehead and chin are typical visual features; The trunk is not pure black, but dark blue; There is a blue chest band on the chest; The whole has a metallic luster in the sun.

2. The tail feathers of swallows extend outward to form a forked tail, which is very recognizable when flying like scissors in the air.

3. Swallow's flying speed can reach120km per hour, and it is one of the best members of the bird family.

4. Eat mosquitoes, flies and other insects raw, and feed them artificially, and occasionally with vegetable leaves or other grains. But in general, swallows can't be farmed artificially, and generally don't eat people's food. Forcing them with their mouths open may not be smooth, and they are wild inside.

Extended data:

Swallow distribution area:

Swallows are generally distributed all over the world except in the coldest areas and extremely remote islands. It is understood that there are about 75 species of swallows in the world, including domestic swallows, rock swallows, grey sand swallows, golden-waisted swallows and hairy-footed swallows, which are mainly distributed in Southeast Asia, northern and eastern Africa, most parts of Europe and parts of North America.

There are also 4 species in China and 3 species in Shouguang, among which domestic swallows and golden waist swallows are more common, and these two species are also the majority in Judian Lake area.

Reference: Baidu Encyclopedia-Swallow