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( Passer)
Many, see text Apart from this semi-natural colonisation, the House Sparrow has been introduced to many parts of the world outside its natural range, including the Americas, sub-Saharan Africa and Australia. The Tree Sparrow has also been artificially introduced on a smaller scale, and there are populations in Australia and locally in Missouri and Illinois in the United States. These sparrows are small passerine birds, typically 10-20 cm long. They are plump brown or greyish birds often with black, yellow or white markings, and with short tails and stubby conical beaks. They are gregarious and will form substantial flocks, and some, though not the House Sparrow, have pleasant songs. name="External_links" id="External_links">
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