Introducing change: A current look at naturalized bird species in western North America

  title={Introducing change: A current look at naturalized bird species in western North America},
  author={Kimball L. Garrett},
116 Abstract: Both purposeful and unintentional introductions by humans of bird species to regions outside their natural ranges have long affected avifaunas, although not all populations of introduced bird species actually attain ecologically invasive status. The 24 years since the most recent comprehensive review of introductions in western North America have seen the continuation of a trend toward establishment of bird species imported for aviculture and the pet trade in urban regions and… 

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