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

by Jeffrey G. Groth

Overview

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.

Product Details

ISBN-13:	9780520097827
Publisher:	University of California Press
Publication date:	08/16/1993
Series:	UC Publications in Zoology , #127
Edition description:	First Edition
Pages:	156
Product dimensions:	7.00(w) x 10.00(h) x (d)