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Worldwide. Deliberately introduced by man on several continents, this bird is an unwelcome addition to the local ecologies, and another glaring example of the folly of the introduction of an alien species.
Nests of grass, wool, feathers and other soft materials are made in holes in buildings or other structures, though house sparrows will also breed in thick ivy and natural structures. The clutch consists of 4-5 glossy pale blue eggs. The young fledge after about 3 weeks.
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