House swallow (scientific name: Hirundo rustica): Bird of the genus Swallow in the family Swallow family. The beak is short and broad, with a broad base and an inverted triangle, with a missing beak near the apex; mouth

House swallow (scientific name: Hirundo rustica): Bird of the genus Swallow in the family Swallow family. The beak is short and broad, with a broad base and an inverted triangle, with a missing beak near the apex; The mouth is extremely deep and the mouth whiskers are underdeveloped. The wings are narrow and pointed, the tail is forked, forming a "swallowtail", the feet are short and thin, and the toes are three in front of and one behind. The main feature is that the upper body is bluish black, but also shiny metallic, and the ventral surface is white. He has a light and agile posture, narrow wings, flying like a scythe, and a forked tail like scissors. Flying fast as an arrow, up and down, east and west, able to change direction rapidly.

They can often be seen in pairs on the branches of fields and riverbanks near villages, and on poles and power lines, they often fly through fields and river beaches. When flying, it opens its mouth to prey on various insects such as flies and mosquitoes. The song is sharp and short. It is the national bird of Estonia and Austria.