Recently, a "mass death of yellow-headed blackbirds" occurred in Chihuahua, Mexico.

The migratory birds reportedly arrived in Mexico from northern Canada, where they have been wintering.

The cause of the mass death of these migratory birds is still unclear, and some people speculate that it may be related to air pollution in the area.

(Produced by Zhou Jing)

Responsible editor: [Ji Xiang]