Jeffrey G. Groth – författare

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1 produkter

1. 

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

   Av Jeffrey G. Groth

   Häftad, 1993

   400 kr

   Lägg i varukorg

   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 …