eWestern Birds
The Quarterly Journal of Western Field OrnithologistsVol. 34, No. 4
December 2003
Western Field Ornithologists

Contents
MAIN ARTICLES
Activity Patterns of White-throated Swifts in California
Thomas P. Ryan and Charles T. Collins
Seasonal Population Fluctuation of White-throated Swifts at Roost Sites in Southern California
Thomas P. Ryan and Charles T. Collins
Social Behavior of White-throated Swifts
Thomas P. Ryan and Charles T. Collins
Diet of Breeding White-throated and Black Swifts in Southern California
Allison D. Rudalevige, Dessie L. A. Underwood, and Charles T. Collins
Molt, Plumage, Body Mass, and Morphometrics of a Population of the White-throated Swift in Southern California
Manuel Marín
Characteristics of Trees Used by Nesting and Roosting Vaux’s Swifts in Northwestern California
John E. Hunter and M. J. Mazurek
Declines in the Breeding Population of Vaux’s Swifts in Northeastern Oregon
Evelyn L. Bull
Purple Martin Population Status, Nesting Habitat Characteristics, and Management in Sacramento, California
Daniel A. Airola and Jesse Grantham
Book Reviews
David Lukas and Steve N. G. Howell
Featured Photo
Marshall J. Iliff
Index
Philip Unitt
Front cover photo by © Larry Sansone of Los Angeles, California: White-throated Swift (Aeronautes saxitalis), Kern River, Tulare County, California, 26 June 2003.
Back cover “Featured Photo” by © Marshall J. Iliff of Costa Mesa, California, Bell’s Sparrow (Amphispiza belli belli), Vizcaino Peninsula, Baja California Sur, Mexico, 23 September 2002.