Contents
A New Species of Cotinga (cotingidae: Doliornis) from the Ecuadorian Andes, with Comments on Plumage Sequences in Doliornis and Ampelion
Mark B. Robbins, Gary H. Rosenberg, and Francisco Sornoza Molina
Dna-dna Hybridization Evidence for Subfamily Structure among Hummingbirds
Robert Bleiweiss, John A. Kirsch, and Juan Carlos Matheus
Magellanic Penguins (spheniscus Magellanicus) Affected by Chronic Petroleum Pollution along Coast of Chubut, Argentina
Patricia Gandini, P. Dee Boersma, Esteban Frere, Marcelo Gandini, Tomas Holik, and Victoria Lichtschein
Effects of Human Intrusion on Song Occurrence and Singing Consistency in Subalpine Birds
Kevin J. Gutzwiller, Richard T. Wiedenmann, Krista L. Clements, and Stanley H. Anderson
Sexual Habitat Segregation by American Redstarts Wintering in Jamaica: Importance of Resource Seasonality
Jeffrey David Parrish and Thomas W. Sherry
Observer Differences in the North American Breeding Bird Survey
John R. Sauer, Bruce G. Peterjohn, and William A. Link
Competition for Winter Territories in a Neotropical Migrant: the Role of Age, Sex and Color
Bridget J. Stutchbury
Population-genetic Structure of a Philopatric, Colonially Nesting Seabird, the Short-tailed Shearwater (puffinus Tenuirostris)
Jeremy J. Austin, Robert W. G. White, and Jennifer R. Ovenden
Tail Ornamentation, Size Dimorphism and Wing Length in the Genus Euplectes (ploceinae)
Staffan Andersson and Malte Andersson
Song Learning as Evidenced from Song Sharing in Two Hummingbird Species (colibri Coruscans and C Thalassinus)
Sandra L. L. Gaunt, Luis F. Baptista, and Julio E. S
A Phylogeny of the Woodcreepers (dendrocolaptinae)
Robert J. Raikow
Life-history Consequences of Avian Brood Reduction
Douglas W. Mock and L. Scott Forbes
Oxygen Consumption during Singing by Male Carolina Wrens (thryothorus Ludovicianus)
Laurie S. Eberhardt
Geographic Variation in Morphology and Allozymes of South American Imperial Shags
Pamela C. Rasmussen
Habitat Selection by Mexican Spotted Owls in Northern Arizona
Joseph L. Ganey and Russell P. Balda
Sucrose Intolerance in Birds: Simple Nonlethal Diagnostic Methods and Consequences for Assimilation of Complex Carbohydrates
Hylary L. Malcarney and Carlos Mart
Loss of Function in Territorial Song: Comparison of Island and Mainland Populations of the Singing Honeyeater (meliphaga Virescens)
Myron Charles Baker
In Memoriam: Maurice Brooks, 1900-1993
Robert Leo Smith and David E. Samuel
In Memoriam: Hamilton Mack Laing, 1883-1982
C. Stuart Houston
In Memoriam: Victor Harrison Cahalane, 1901-1993
C. Stuart Houston
In Memoriam: Crawford H Greenewalt, 1902-1993
Albert E. Conway
William Brewster Memorial Award, 1993:
Richard T. Holmes
Elliott Coues Award, 1993:
Joel L. Cracraft
Covers
Front Matter
The Auk
Back Matter
The Auk
Short Communications
Are Actitis Sandpipers Inverted Flying Fishes?
Edwin O. Willis
On No-chickadee Zones in Midwestern North America: Evidence from the Ohio Breeding Bird Atlas and the North American Breeding Bird Survey
Thomas C. Grubb Jr., Robert A. Mauck, and Susan L. Earnst
Composition and Microclimate of Prothonotary Warbler Nests
Charles R. Blem and Leann B. Blem
The Gray-necked Wood-rail: Habits, Food, Nesting, and Voice
Alexander F. Skutch
Interspecific Aggression by Tundra Swans Toward Snow Geese on the Sagavanirktok River Delta, Alaska
Robert M. Burgess and Alice A. Stickney
Age of First Breeding in Common Murres
M. P. Harris, D. J. Halley, and R. L. Swann
Spring Arrival, Aggression and Testosterone in Female Red-winged Blackbirds (agelaius Phoeniceus)
Daniel A. Cristol and Torgeir S. Johnsen
Consequences of Nest Desertion and Inattendance for Magellanic Penguin Hatching Success
Pablo Yorio and P. Dee Boersma
House Finches Are what They Eat: a Reply to Hudon
Geoffrey E. Hill
Why We Should Adopt a Broader View of Neotropical Migrants
Douglas J. Levey