Contents
The Ecology of Seabird Feeding Flocks in Alaska
Wayne Hoffman, Dennis Heinemann, and John A. Wiens
Sexual Size Dimorphism and Survival of Male and Female Blackbirds (icteridae)
William A. Searcy and Ken Yasukawa
Hind Limb Morphology, Phylogeny, and Classification of the Piciformes
Edward V. Swierczewski and Robert J. Raikow
The Phylogenetic Relationships of the Piciformes (class Aves)
Sharon F. Simpson and Joel Cracraft
Lack of Differential Survival among Young Ipswich Sparrows
Howard A. Ross and Ian A. Mclaren
Overwinter Mortality and Sexual Size Dimorphism in the House Sparrow
Richard F. Johnston and Robert C. Fleischer
Song Dialects, Migration, and Population Structure of Puget Sound White-crowned Sparrows
Dennis Heinemann
Colonial Defense Behavior in Double-crested and Pelagic Cormorants
Douglas Siegel-Causey and George L. Hunt Jr.
Notes and News
The Auk
Male and Female Parental Roles in the Western Gull under Different Environmental Conditions
Raymond Pierotti
Colony Site Dynamics and Habitat Use in Atlantic Coast Seabirds
R. Michael Erwin, Joan Galli, and Joanna Burger
Seasonal Changes in Woodpecker Foraging Patterns
Richard N. Conner
Movements of Adult and Juvenile Bananaquits Within a Morph-ratio Cline
Joseph M. Wunderle Jr.
The Structure of Western Warbler Assemblages: Analysis of Foraging Behavior and Habitat Selection in Oregon
Michael L. Morrison
Arrival and Departure Frequencies of Great Blue Herons at Two Oregon Estuarine Colonies
Range D. Bayer
Second-wave Nesting of the California Least Tern: Age Composition and Reproductive Success
Barbara W. Massey and Jonathan L. Atwood
In Memoriam: Leslie Mills Tuck
W. A. Montevecchi
Covers
Front Matter
The Auk
Back Matter
The Auk
Short Communications
Effects of Abundant Species on the Ability of Observers to Make Accurate Counts of Birds
J. Michael Scott and Fred L. Ramsey
Responsiveness of Male Swamp Sparrows to Temporal Organization of Song
William A. Searcy, Evan Balaban, Richard A. Canady, Stephen J. Clark, Steven Runfeldt, and Heather Williams
The Development of Effective Endothermy and Homeothermy by Nestling Pi
L. Clark and Russell P. Balda
Geographic Variation in the Juvenal Plumage of the Lesser Nighthawk (chordeiles Acutipennis)
Robert W. Dickerman
A Blue Bunting [passerina (cyanocompsa) Parellina] Record for the United States from Louisiana
Steven W. Cardiff and J. V. Remsen Jr.
Predator Alarm Calls of Young Black-capped Chickadees
Karen M. Apel and Millicent S. Ficken
Nest-site Tenacity and Mate Fidelity in Female-female Pairs of Ring-billed Gulls
Kit M. Kovacs and John P. Ryder
Near-ultraviolet Light Reception in the Mallard
John Parrish, Roger Benjamin, and Ricky Smith
Courtship Display and Copulation Observed in a Pair of Philippine Hanging Parrots (loriculus Philippensis Philippensis)
Elisha W. Burr
Autumn Selection of Breeding Location by Field Sparrows
Raymond J. Adams Jr. and Richard Brewer
A Probable Record of Intraspecific Egg Dumping for Sandhill Cranes
Carroll D. Littlefield
Commentaries
The International Ornithological Congress: a Counter View
Donald S. Farner
The Condor Case: an Uphill Struggle in a Downhill Crush
Frank A. Pitelka
Ornithology as Science
George T. Austin, Emmet R. Blake, Pierce Brodkorb, M. Ralph Browning, W. Earl Godfrey, John P. Hubbard, Guy Mccaskie, Joe T. Marshall Jr., Gale Monson, Storrs L. Olson, Henri Ouellet, Ralph S. Palmer, Allan R. Phillips, Warren M. Pulich, Mario A. Ramos, Amadeo M. Rea, and Dale A. Zimmerman
Response: in the Eye of the Beholder
Elliot J. Tramer
Response: Ornithology as Science
Robert C. Whitmore
Response: Ornithology and Ecology as Sciences
James A. Macmahon and Peter B. Landres