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Evolutionary Differentiation in Morphology, Vocalizations, and Allozymes Among Nomadic Sibling Species in the North American Red Crossbill (Loxia Curvirostra) Complex
Jeffrey G. Groth
出版Univ of California Press, 1993-08-16
主題Nature / Birdwatching GuidesNature / Animals / BirdsScience / Life Sciences / BiologyScience / Life Sciences / EvolutionScience / Life Sciences / Zoology / GeneralScience / Life Sciences / Zoology / Ornithology
ISBN05200978239780520097827
URLhttp://books.google.com.hk/books?id=ea4wDwAAQBAJ&hl=&source=gbs_api
EBookSAMPLE
註釋The highly variable North American red crossbill complex has presented one of the most controversial problems in avian systematics. Although crossbills wander nomadically and breed all year, they have not become homogenized in bill and body size. This study suggests that this crossbill complex contains several distinctive sibling species that breed sympatrically and show ecological differences.