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- DescriptionThe highly variable North American red crossbill complex has presented one of the most controversial problems in avian systematics. Although crossbills wander madically and breed all year, they have t 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.
- Author(s)Jeffrey G. Groth
- PublisherUniversity of California Press
- Date of Publication16/08/1993
- SubjectLife Sciences: Zoology
- Series TitleUC Publications in Zoology S.
- Place of PublicationBerkerley
- Country of PublicationUnited States
- ImprintUniversity of California Press
- Content NoteIllustrations, maps
- Weight49 g
- Width178 mm
- Height254 mm
- Spine8 mm
- Format DetailsTrade paperback (US)
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