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Related story: Half of North American bird species threatened by climate change
Related story: Half of North American bird species threatened by climate change

Half of all bird species in North America — including the bald eagle — are at risk of severe population decline by 2080 if the swift pace of global warming continues, the National Audubon Society concluded in a study released Monday. "The scale of the disruption we're projecting is a real punch in the gut," said Gary Langham, chief Audubon scientist. Langham led an Audubon study that examined more than 500 bird species and determined that more than 300 in Canada and the United States face large climate shifts that could reduce their habitat by half or more by 2080. The changing environment will force birds to adapt to new habitats with different temperature and...

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