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Particular Endangered Species Miscellany
Birds Miscellany

US bird populations are down 29% in 50 years      web

webhttps://www.nationalgeographic.com/animals/2019/09/three-billion-birds-lost-north-america/
publicationNational Geographic
date2019-09-19

Documents:
the rapid decline of North American birds
webKenneth V. Rosenberg, Adriaan ...Science2019-09-19

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