The Eurasian tree sparrow (Passer montanus) is a passerine bird in the sparrow family with a rich chestnut crown and nape, and a black patch on each pure white cheek. The sexes are similarly plumaged, and young birds are a duller version of the adult. This sparrow breeds over most of temperate Eurasia and Southeast Asia, where it is known as the tree sparrow.
Did You Know? . In 1958, Chairman Mao started a campaign to eliminate sparrows thinking it would reduce crop damage. Millions of sparrows were successfully killed under the Four Pest campaign yet the number of crop-eating locusts the sparrows consumed increased. Unfortunately, millions of people were killed due to famine.