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Fly away home? Ice age may have clipped bird migration


ScienceDaily

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The onset of the last ice age may have forced some bird species to abandon their northerly migrations for thousands of years, says new research led by an ornithologist. The study challenges a long-held presumption that birds merely shortened their migratory flights when glaciers advanced south to cover much of North America and northern Europe about 21,000 years ago.pYkCXIFfTAA

 

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