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Paperback version af Evolutionary Differentiation in Morphology, Vocalizations, and Allozymes Among Nomadic Sibling Species in the North American Red Crossbill (Loxia curvirostra) Complex af Jeffrey G. Groth

Evolutionary Differentiation in Morphology, Vocalizations, and Allozymes Among Nomadic Sibling Species in the North American Red Crossbill (Loxia curvirostra) Complex

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  • Engelsk
  • 156 sider

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Beskrivelse

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.

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Størrelse og vægt
  • Vægt272 g
  • Dybde0,8 cm
    • coffee cup img
    10 cm
    book img
    17,8 cm
    25,4 cm

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    Biology, life sciences Biology, life sciences, Wildlife: birds & birdwatching: general interest, Zoology & animal sciences Wildlife: birds & birdwatching: general interest Zoology & animal sciences