Karyotypic analyses of Cardinalis cardinalis (Linnaeus) (Passeriformes: Fringillidae) reveal a diploid number of approximately 84. Three different karyotypes were observed resulting from polymorphism of one macrochromosome pair. It is suggested that the observed polymorphism resulted from a single pericentric inversion. Similarities between karyotypes of this species and those of Zonotrichia albicollis and Junco hyemalis are discussed.
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Rebecca A. Bass (1979) studied this question.
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