Contents
Brood Division by Lapland Longspurs
Robert L. Mclaughlin and Robert D. Montgomerie
Notes and News
The Auk
Foreign Objects in Bird Nests
Michael R. Conover
Iridescent Polychromatism in a Female Hummingbird: is It Related to Feeding Strategies?
Robert Bleiweiss
100 Years Ago in the Auk
The Auk
Habitat Segregation Between the Sexes of Wintering Hooded Warblers (wilsonia Citrina)
James F. Lynch, Eugene S. Morton, and Martha E. Voort
Why Hummingbirds Hover
Richard S. Miller
Seasonal Timing, Geographic Distribution, and Flight Behavior of Broad-winged Hawks during Spring Migration in South Texas: a Radar and Visual Study
Paul Kerlinger and Sidney A. Gauthreaux Jr.
Short-term Temporal Avoidance of Interspecific Acoustic Interference among Forest Birds
James W. Popp, Robert W. Ficken, and James A. Reinartz
Water Loss and Pipping Sequence in the Eggs of the Red-tailed Tropicbird (phaethon Rubricauda)
G. C. Whittow and G. S. Grant
Cooperative Breeding in Lanius Shrikes I Habitat and Demography of Two Sympatric Species
Steve Zack and J. David Ligon
Cooperative Breeding in Lanius Shrikes Ii Maintenance of Group-living in a Nonsaturated Habitat
Steve Zack and J. David Ligon
The Effect of Disturbance on Mourning Dove Nesting Success
David Westmoreland and Louis B. Best
Hatching Asynchrony in the Mountain White-crowned Sparrow (zonotrichia Leucophrys Oriantha): a Selected or Incidental Trait?
Paul S. Mead and Martin L. Morton
Ephemeral Roosts and Stable Patches? a Radiotelemetry Study of Communally Roosting Starlings
Douglas W. Morrison and Donald F. Caccamise
Variation in Altitudinal Migration, Winter Segregation, and Site Tenacity in Two Subspecies of Dark-eyed Juncos in the Southern Appalachians
Kerry N. Rabenold and Patricia Parker Rabenold
Migratory Disposition and Choice of Diet by the Yellow-rumped Warbler (dendroica Coronata)
Frank R. Moore and Patricia A. Simm
Effects of Nine Years of Fox Predation on Two Species of Breeding Gulls
William E. Southern, Stephen R. Patton, Linda K. Southern, and Lise A. Hanners
Monophyly and Phylogenetic Relationships of the Pelecaniformes: a Numerical Cladistic Analysis
Joel Cracraft
Social Modeling Theory: a Possible Framework for Understanding Avian Vocal Learning
Irene M. Pepperberg
In Memoriam: Ira Noel Gabrielson
Henry M. Reeves and David B. Marshall
In Memoriam: Launcelot Eric Richdale
John Warham
In Memoriam: Edmund W Mudge
The Auk
Index to Volume 102
The Auk
Covers
Front Matter
The Auk
Back Matter
The Auk
Short Communications
Feeding Habits of the Citreoline Trogon in a Tropical Deciduous Forest during the Dry Season
Luis E. Eguiarte and Carlos Mart
Morphology and Physiology of Female-female Pair Members
Kit M. Kovacs and John P. Ryder
The Call of Bulwer's Petrel (bulweria Bulwerii), and the Relationship Between Intersexual Call Divergence and Aerial Calling in the Nocturnal Procellariiformes
Paul C. James and Hugh A. Robertson
Stability of Flock Composition in Urban Pigeons
Louis Lefebvre
Erect Posture of the Young Black-billed Cuckoo: an Adaptation for Early Mobility in a Nomadic Species
Spencer G. Sealy
Commentaries
Patterns of Egg-laying in Prairie Ducks
S. V. Briggs
Counting Seabirds at Sea from Ships: Comments on Interstudy Comparisons and Methodological Standardization
J. Christopher Haney
Response to J C Haney
Mark L. Tasker, Peter Hope Jones, Barry F. Blake, and Tim J. Dixon
Response to J-f Giroux
Patrick J. Weatherhead and Drew J. Hoysak