Contents
Multiple Paternity in a Wild Population of Mallards
Susan Evarts and Christopher J. Williams
Energy Expenditure during Free Flight in Trained and Free-living Eurasian Kestrels (falco Tinnunculus)
Dirkjan Masman and Marcel Klaassen
100 Years Ago in the Auk
The Auk
Is Courtship Intensity a Signal of Male Parental Care in Red-winged Blackbirds (agelaius Phoeniceus)?
Ken Yasukawa, Richard L. Knight, and Susan Knight Skagen
Intersexual Differences in Food Consumption by Hand-reared Great-tailed Grackle (quiscalus Mexicanus) Nestlings
Kevin L. Teather
Morphometric Correlates of Age and Breeding Status in American Coots
Ray T. Alisauskas
Roost Attendance and Aggression in Black Vultures
Patricia Parker Rabenold
Notes and News
The Auk
Genic Population Structure and Gene Flow in the Northern Flicker (colaptes Auratus) Hybrid Zone
Thaddeus A. Grudzien, William S. Moore, J. Richard Cook, and Danilo Tagle
Differences in Sexual Size Dimorphism and Body Proportions Between Adult and Subadult House Sparrows in North America
W. Bruce Mcgillivray and Richard F. Johnston
Increase of Parental Effort with Brood Size in a Nidifugous Bird
Martin Schindler
Body and Organ Mass and Body Composition of Postbreeding Female Lesser Scaup
Jane E. Austin and Leigh H. Fredrickson
Effect of Experimentally Altered Brood Size on Frequency and Timing of Second Clutches in the Great Tit
Henrik G. Smith and Hans K
Incubation Behavior of Emperor Geese Compared with Other Geese: Interactions of Predation, Body Size, and Energetics
Steven C. Thompson and Dennis G. Raveling
Signaling Subordinate and Female Status: Two Hypotheses for the Adaptive Significance of Subadult Plumage in Female Tree Swallows
Bridget J. Stutchbury and Raleigh J. Robertson
Genetic Variation in Piciform Birds: Monophyly and Generic and Familial Relationships
Scott M. Lanyon and Robert M. Zink
Energy Metabolism in the Locomotor Muscles of the Common Murre (uria Aalge) and the Atlantic Puffin (fratercula Arctica)
M. Benjamin Davis and Helga Guderley
In Memoriam: Terence M Shortt, 1911-1986
John Cranmer-Byng
Index to Volume 104
The Auk
Covers
Front Matter
The Auk
Back Matter
The Auk
Short Communications
Allozyme Analysis of the California Gull (larus Californicus)
Stephen A. Karl and Robert M. Jehl Jr.
Energetic Consequences of Sexual Size Dimorphism in White Ibises (eudocimus Albus)
Keith L. Bildstein
Intraspecific Avoidance and Interspecific Overlap of Song Series in the Eastern Meadowlark
Richard W. Knapton
Sexing Monomorphic Birds by Vent Measurements
P. Dee Boersma and Emily M. Davies
Metabolic Rate and Thermostability in Relation to Availability of Yolk in Hatchlings of Black-legged Kittiwake and Domestic Chicken
Marcel Klaassen, Guri Slagsvold, and Claus Bech
Commentaries
Brown Noddy Vocal Behavior
John W. Chardine
Does Experience with Predators Affect Parental Investment?
Ronald M. Coleman
Response to R M Coleman
Richard L. Knight and Stanley A. Temple