Contents
The Influence of Habitat, Prey Abundance, Sex, and Breeding Success on the Ranging Behavior of Prairie Falcons
John M. Marzluff, Bryan A. Kimsey, Linda S. Schueck, Mary E. Mcfadzen, Marks S. Vekasy, and James C. Bednarz
Hybridization and Reproductive Performance in Gulls of the Larus Glaucescens-occidentalis Complex
Douglas A. Bell
Influence of Alternate Host Densities on Brown-headed Cowbird Parasitism Rates in Black-capped Vireos
David R. Barber and Thomas E. Martin
Brood Parasitism, Nest Predation, and Season-long Reproductive Success of a Tropical Island Endemic
Bethany L. Woodworth
Nest Predation and Cowbird Parasitism Create a Demographic Sink in Wetland-breeding Song Sparrows
Christopher M. Rogers, Mary J. Taitt, James N.M. Smith, and Gwen Jongejan
Characteristics and Competition for Nest Cavities in Burrowing Procellariiformes
Jaime A. Ramos, Luis R. Monteiro, Encarnacion Sola, and Zita Moniz
Intraspecific Competition Influences Food Return-predation Risk Trade-off by White-crowned Sparrows
Robert Slotow and Ellen Paxinos
The Response of Male and Female Song Sparrows to Geographic Variation in Song
William A. Searcy, Stephen Nowicki, and Melissa Hughes
The Distribution of Neotropical Migrant Birds Wintering in the El Cielo Biosphere Reserve, Tamaulipas, Mexico
Wendy K. Gram and John Faaborg
Seasonal Variation in the Foraging Ecology of the Wood Stork in the Southern Llanos of Venezuela
Josg A. Gonzalez
Patterns of Frugivory and Energetic Condition in Nearctic Landbirds during Autumn Migration
Jeffrey D. Parrish
Effects of the Landscape on Shorebird Movements at Spring Migration Stopovers
Adrian H. Farmer and Alfred H. Parent
Effects of Small Forest Openings on the Breeding Bird Community in a Vermont Hardwood Forest
Stephen S. Germaine, Stephen H. Vessey, and David E. Capen
Bird-habitat Relationships in a Vegetational Gradient in the Andes of Central Chile
Cristian F. Estades
Effects of the Exxon Valdez Oil Spill on Habitat Use by Birds along the Kenai Peninsula, Alaska
Robert H. Day, Stephen M. Murphy, John A. Wiens, Gregory D. Hayward, E. James Harner, and Brian E. Lawhead
At-sea Density Monitoring of Marbled Murrelets in Central California: Methodological Considerations
Benjamin H. Becker, Steven R. Beissinger, and Harry R. Carter
Effects of Caching on Acorn Tannin Levels and Blue Jay Dietary Performance
Mark D. Dixon, W. Carter Johnson, and Curtis S. Adkisson
Effectiveness, Biases and Mortality in the Use of Apomorphine for Determining the Diet of Granivorous Passerines
Francisco Valera, Jose E. Gutierrez, and Rafael Barrios
Bias Associated with Diet Samples in Audouin's Gulls
Jacob Gonzalez-Solfs, Daniel Oro, Vittorio Pedrocchi, Lluis Jover, and Xavier Ruiz
Torpor in Three Species of Brazilian Hummingbirds under Semi-natural Conditions
Claus Bech, Augusto S. Abe, John Fleng Steffensen, Martin Berger, and John Eduardo Bicudo
Body Composition of the European Barn Owl during the Nonbreeding Period
Sylvie Massemin, Rene Groscolas, and Yves Handrich
Commentary
The Condor
Book Reviews
The Condor
News and Notes
The Condor
Covers
Back Matter (PDF)
The Condor
Front Matter (PDF)
The Condor
Short Communications
A Test of an Environmental Advertisement Hypothesis for the Function of Drumming in Yellow-bellied Sapsuckers
Laurie S. Eberhardt
Mixed Sexual Dimorphism in Semipalmated Plovers
Kevin L. Teather and Erica Nol
Genetic Diversity and Divergence of Endangered Galapagos and Hawaiian Petrel Populations
Robert A. Browne, David J. Anderson, Jeffrey N. Houser, Felipe Cruz, Kevin J. Glasgow, Cathleen Natividad Hodges, and Greg Massey
Intra- Snd Interspecific Sequence Variation in a Portion of the Mitochondrial Nd6 Gene in Cuckoos
David A. Jones and H. Lisle Gibbs
Morphological and Vocal Variation among Subspecies of the Black-faced Sheathbill
Joel Bried and Pierre Jouventin
Estradiol Dosage and the Solicitation Display Assay in Red-winged Blackbirds
William A. Searcy and Michael S. Cave
Sex Identification in the Egyptian Vulture by Flow Cytometry and Cytogenetics
Delia Cavallo, Raffaele De Vita, Patrizia Eleuteri, Robert H.R. Belterman, and Giacomo Dell'Omo