Evolutionary differentiation in morphology, vocalizations, and allozymes among nomadic sibling species in the North American red crossbill (Loxia curvirostra) complex
著者
書誌事項
Evolutionary differentiation in morphology, vocalizations, and allozymes among nomadic sibling species in the North American red crossbill (Loxia curvirostra) complex
（University of California publications in zoology, v. 127）
University of California Press, 1993
- pbk. : alk. paper
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注記
"A contribution from the Museum of Vertebrate Zoology of the University of California at Berkeley."
Includes bibliographical references and index
内容説明・目次
内容説明
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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