Contents
A New Hybrid Bunting (passerina Cyanea X Passerina Ciris)
Walter Kingsley Taylor
Hierarchy of Waterfowl Feeding with Whistling Swans
Robert O. Bailey and Bruce D. J. Batt
The Vee Formation of Canada Geese
Lisa Lofland Gould and Frank Heppner
Analysis of the Drums of Ruffed Grouse
David E. Samuel, Donald R. Beightol, and Carlos W. Brain
Directional Differences in the Sound Intensity of Ruffed Grouse Drumming
Herbert L. Archibald
Environmental Limitations of Pheasant Egg Hatching Success
Trina Schulte and Warren P. Porter
Predation and the Daily Timing of Sage Grouse Leks
Jonathan E. Hartzler
Relationship of Anting and Sunbathing to Molting in Wild Birds
Eloise F. Potter and Doris C. Hauser
Some Measures of Feeding Behavior in Captive Common Crows
Robert W. Powell
Recent Changes in the Ring-billed Gull Population and Biology in the Laurentian Great Lakes
James P. Ludwig
A Nesting of Black Vultures
Paul A. Stewart
Periodical Literature
The Auk
General Notes
First North Atlantic Record of the White Tern
David B. Wingate and George E. Watson
Summer Tanager Southern Range Extension in Chile
Kenneth W. Prescott
Incomplete Wing Molt and Erythrism in Red-tailed Hawks
Richard O. Bierregaard Jr.
Copulatory and Vocal Behavior of a Pair of Whiskered Owls
Dennis J. Martin
Abnormal Bill of a White-winged Crossbill
George C. West
Breeding of the Green-bellied Hummingbird
Barbara K. Snow and D. W. Snow
Puna Bird Species on the Coast of Peru
David L. Pearson
Relationship of Veniliornis Cassini" Chocoensis and V "cassini" Caquetanus with V Affinis"
L. L. Short
Florida Burrowing Owl Collected in North Carolina
Paul W. Sykes Jr.
Individual Distance in the Herring Gull
Thomas C. Grubb Jr.
Cannibalism in Red-tailed Hawk
G. A. Clevenger and Aryan I. Roest
Great Kiskadee Nesting in an Old Woodpecker Hole
F. Haverschmidt
Covers
Front Matter
The Auk
Back Matter
The Auk