Contents
Breeding Ecology and Extinction of the Great Auk (pinguinus Impennis): Anecdotal Evidence and Conjectures
Sven-Axel Bengtson
Songs of the Alder Flycatcher (empidonax Alnorum) and Willow Flycatcher (empidonax Traillii) Are Innate
Donald E. Kroodsma
Reproductive Energetics of Two Tropical Bird Species
D. M. Bryant, C. J. Hails, and P. Tatner
Notes and News
The Auk
The Influence of Nectar Resources on Nesting Success and Movement Patterns of the Common Amakihi (hemignathus Virens)
Charles Van Riper III
Must Desert Chukars (alectoris Chukar Sinaica) Drink Water? Water Influx and Body Mass Changes in Response to Dietary Water Content
A. Allan Degen, Berry Pinshow, and Peter J. Shaw
The Detection of Near-ultraviolet Light by Nonmigratory and Migratory Birds
John W. Parrish, James A. Ptacek, and Kevin L. Will
Age-related Mortality in a Wintering Population of Dunlin
Barbara E. Kus, Philip Ashman, Gary W. Page, and Lynne E. Stenzel
The Hindlimb Musculature of the White-fronted Amazon (amazona Albifrons, Psittaciformes)
Susan L. Berman
Effect of Diet on Visceral Morphology of Breeding Wood Ducks
Ronald D. Drobney
Karyotypic Evolution and Long-term Effective Population Sizes of Birds
George F. Barrowclough and Gerald F. Shields
Growth of the Wedge-tailed Shearwater in the Hawaiian Islands
Ted N. Pettit, G. Vernon Byrd, G. Causey Whittow, and Michael P. Seki
The Role of Plumage Polymorphism in Dominance Relationships of the White-throated Sparrow
Doris J. Watt, C. John Ralph, and Carter T. Atkinson
Seasonal Influence on the Strategies of Growth and Development of Canvasback and Lesser Scaup Ducklings
Jill P. Lightbody and C. Davison Ankney
On the Use of Avian Mortality Patterns to Test Sexual Selection Theory
Patrick J. Weatherhead, Hamilton Greenwood, and Robert G. Clark
Sexual Selection and Interspecific Competition: a Field Experiment on Territorial Behavior of Nonparental Finches (vidua Spp)
Robert B. Payne and Kathleen D. Groschupf
In Memoriam: George Miksch Sutton
Olin Sewall Pettingill Jr.
100 Years Ago in the Auk
The Auk
Brewster and Coues Awards
The Auk
Covers
Front Matter
The Auk
Back Matter
The Auk
Short Communications
Ratios in Avian Physiology
Charles R. Blem
A Hybrid Red Crossbill-pine Siskin (loxia Curvirostra X Carduelis Pinus) and Speculations on the Evolution of Loxia
Dan A. Tallman and Richard L. Zusi
The Effect of Burrow Loss on Mate Choice in the Leach's Storm-petrel
Douglass H. Morse and Stephen W. Kress
Observations on the Cooling Tolerance of Embryos of the Diving Petrel Pelecanoides Georgicus
Daniel D. Roby and Robert E. Ricklefs
Light-breasted Purple Martins Dominate Dark-breasted Birds in a Roost: Implications for Female Mimicry
Charles R. Brown
Dietary Sulfur Amino Acid Availability and Molt Dynamics in White-crowned Sparrows
Mary E. Murphy and James R. King
Fault Bars in the Feathers of White-crowned Sparrows: Dietary Deficiency or Stress of Captivity and Handling?
James R. King and Mary E. Murphy
Molecular Population Genetics of Tufted and Black-crested Forms of Parus Bicolor
David Braun, G. B. Kitto, and M. J. Braun
Feather Pulp: a Non-destructive Sampling Technique for Electrophoretic Studies of Birds
J. Ellen Marsden and Bernie May
Food-niche Relationships Between Great Horned Owls and Common Barn-owls in Eastern Washington
Richard L. Knight and Ronald E. Jackman
Broodedness in Bobolinks
Thomas A. Gavin
Plumage Wettability of Aquatic Birds
Sheila A. Mahoney
First Record of the Red Phalarope from the Philippines
E. William Wischusen, Robert S. Kennedy, and Stepfien E. Gast
Notes on the Behavior of Ramphotrigon Flycatchers
Theodore A. Parker III
The Dwarf Tinamou (taoniscus Nanus) of Central Brazil
Dante Martins Teixeira and Alvaro Negret
Breeding Record for the Sooty Shearwater (puffinus Griseus) from Chiloe Island, Chile
Manuel Marin A.
Avian Methods of Feeding on Bursera Simaruba (burseraceae) Fruits in Panama
Jill M. Trainer and Tom C. Will
Evidence of Aggressive Behavior in Female Blue Grouse
Richard A. Lewis
Commentaries
Paracas Revisited: Do Shorebirds Compete on Their Wintering Ground?
J. P. Myers and B. J. Mccaffery
Paracas Rejoined--do Shorebirds Compete in the Tropics?
David Cameron Duffy, David C. Schneider, and Natasha Atkins
Editorial
The Place of Long-term Studies in Ornithology
John A. Wiens