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Check-list of North American birds. Seventh edition. American Ornithologists' Union, Washington, D.C. [as modified by subsequent supplements and corrections published in <i>The Auk</i>]. Also available online: http://www.aou.org/.","conceptName":"<i>Charadrius hiaticula</i>","taxonomicComments":"<i>C. hiaticula</i> and <i>C. semipalmatus</i> are considered conspecific by some authors (AOU 1983). 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