Gray Yan Yang is a pair or a pair

Gray Yan can only raise one.This bird is mainly distributed in the southwestern part of my country. It is more common in Yunnan Province. Like cluster life, insects are usually captured in the air, and mud nests will be made on eaves and walls.Its body length is only 18 cm, the upper body is pale gray, with a little sand and brown on the forehead and top of the head. The back neck is gray -brown, the chest is gray, and the abdomen and tail feathers are white.