Assertion: pica magpie | /r/HasProperty | races of one species
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text: Recent research comparing 813 bp mtDNA sequences indicates that either all Pica magpies should be considered races of one species, or that P. p. sericea needs to be separated as a distinct species; it has been reproductively isolated for longer even than the Yellow-billed Magpie (P. nuttalli) of North America.