Some migratory birds can't find success in urban areas, study finds

New research finds fresh evidence that urbanization in the United States threatens the populations of some species of migratory birds. But the six-year study also refutes one of the most widely accepted explanations of why urban areas are so hostile to some kinds of birds.

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<p><a href="http://www.physorg.com/news126277488.html">Some migratory birds can't find success in urban areas, study finds</a></p> <p>New research finds fresh evidence that urbanization in the United States threatens the populations of some species of migratory birds. But the six-year study also refutes one of the most widely accepted explanations of why urban areas are so hostile to some kinds of birds.</p>