Western Birds

Vol. 42, No. 1

March 2011

Western Field Ornithologists



Western Birds 45(4) Front Cover


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Main Articles

Elevation Ranges of Birds on the Sierra Nevadas West Slope
Rodney B. Siegel, Robert L. Wilkerson, James F. Saracco, and Zachary L. Steel

An Outpost for Desert Birds on the Coastal Slope of Southern California
Kenneth L. Weaver


First Record of the Bridled Morph of the Common Murre in the Pacific
Annie E. Schmidt and Pete Warzybok

Merlin Chases Passerines Flushed by Northern Harrier
Scott McConnell

Book Reviews
David Vander Pluym and Lori Hargrove

Featured Photo: Hybrid Townsend’s x Yellow-rumped Warblers
from Oregon and Arizona

Alan Contreras

Front cover photo by © Martijn Verdoes/www.agami.nl of Menlo Park, California: Great-winged Petrel (Pterodroma macroptera), Monterey Bay, Santa Cruz County, California, 18 September 2010, representing the third North American record of this Southern Hemisphere species.

Back cover “Featured Photos” by © Dwight Porter of Portland, Oregon: apparent hybrid Townsend’s x Audubon’s Yellow-rumped Warbler (Dendroica townsendi x D. coronata auduboni), Malheur National Wildlife Refuge, Harney County, Oregon, 6 June 2010.