The Eurasian tree sparrow (Passer montanus) is a bird in the sparrow family with a rich chestnut crown and nape, and a black patch on pure white cheeks on both sexes. It is widespread in the towns and cities of eastern Asia, but in Europe it is a bird of the lightly wooded open countryside. It is not closely related to the American tree sparrow. Its untidy nest is built within a natural cavity, a hole in a building, or the large nest of a Eurasian magpie or white stork. It feeds mainly on seeds, but invertebrates are also consumed, particularly during the breeding season. Parasites, diseases and birds of prey take their toll, and the typical life span is about two years. There have been large declines in western European populations, in part due to increased use of herbicides and a decline in winter stubble fields. The species has long been depicted in Chinese and Japanese art, and has appeared on the postage stamps of Antigua and Barbuda, Belarus, Belgium, Cambodia, the Central African Republic, China, Estonia, The Gambia and Taiwan. (Full article...)