Contents
Two Song Populations of the Northern Parula
Ralph R. Moldenhauer
Diving Pattern and Performance in Nonbreeding Gentoo Penguins (pygoscelis Papua) during Winter
Tony D. Williams, Akiko Kato, John P. Croxall, Yasu Naito, Dirk R. Briggs, Steven Rodwell, and Tim R. Barton
Effects of Age, Sex, and Fat Level on Wing Loading in Dark-eyed Juncos
C. Ray Chandler and Robert S. Mulvihill
Effects of Parental Age on Hatching Asynchrony, Egg Size and Third-chick Disadvantage in Western Gulls
William J. Sydeman and Steven D. Emslie
Structure of Turning in Airborne Rock Dove (columba Livia) Flocks
Harold Pomeroy and Frank Heppner
Water and Energy Limitations on Flight Duration in Small Migrating Birds
Nurit Carmi, Berry Pinshow, Warren P. Porter, and Jim Jaeger
Variable Mating System of a Sedentary Tropical Duck: the White-cheeked Pintail (anas Bahamensis Bahamensis)
Lisa Guminski Sorenson
Observations on the Systematics, Behavior, and Vocalizations of Thamnomanes" Occidentalis (formicariidae)"
Bret M. Whitney
Effects of Variable Humidity on Embryonic Development and Hatching Success of Mourning Doves
Glenn E. Walsberg and Catherine A. Schmidt
Lunar Influence on Foraging and Nesting Activity of Common Poorwills (phalaenoptilus Nuttallii)
R. Mark Brigham and Robert M. R. Barclay
Multiple Brooding and Productivity of a Neotropical Migrant, the Black-throated Blue Warbler (dendroica Caerulescens), in an Unfragmented Temperate Forest
Richard T. Holmes, Thomas W. Sherry, Peter P. Marra, and Kenneth E. Petit
Living Off the Wax of the Land: Bayberries and Yellow-rumped Warblers
Allen R. Place and Edmund W. Stiles
Bird Speciation in Subtropical South America in Relation to Forest Expansion and Retraction
Manuel Nores
Biochemical Analysis of Relationships of Mediterranean Alectoris Partridges
Ettore Randi, Alberto Meriggi, Rita Lorenzini, Gea Fusco, and Philip U. Alkon
Differential Growth Patterns of Nestling Brown-headed Cowbirds and Yellow-headed Blackbirds
Catherine P. Ortega and Alexander Cruz
In Memoriam: James C Greenway, Jr, 1903-1989
Francois Vuilleumier
In Memoriam: Henry M Stevenson, 1914-1991
Frances C. James
In Memoriam: Olli Juhani J
Risto A. V
Estimating Absolute Densities of Flying Seabirds Using Analyses of Relative Movement
Larry Spear, Nadav Nur, and David G. Ainley
Cost of Short Flights in the Willow Tit Measured with Doubly-labeled Water
Allan Carlson and Juan Moreno
Daily Energy and Expenditure by Black-capped Chickadees (parus Atricapillus) in Winter
William H. Karasov, Margaret C. Brittingham, and Stanley A. Temple
Exotic Birds: a Growing Problem with No Easy Solution
Stanley A. Temple
Covers
Front Matter
The Auk
Back Matter
The Auk