Sparrow:

It is the collective name of 27 kinds of small birds such as sparrows. They are similar in size and color. Generally, the upper body is brown and black, so it is commonly known as sparrow. There are 9 primary flight feathers, and the light-colored feather edges of the outer flight feathers are at the root and near end of the feathers, which are slightly enlarged and slightly crossed into two transverse spots, especially during flight. The mouth is short, thick and strong, conical, and the top is slightly curved. Except tree finches, both sexes are different colors.

There are 27 species in the world, 5 of which are distributed in China. It is quite widely distributed. Except the extremely cold polar regions and alpine deserts, they are distributed all over the world.

It is listed in IUCN 20 13 version 3. 1 Red List of Endangered Species.