Contents
The White-eared Puffbird
Don R. Eckelberry
Evolutionary Relationships among the North American Mallards
Paul A. Johnsgard
Revised List of the Birds of the Commander Islands
Hans Johansen
Winter Feeding Patterns in the House Sparrow
James R. Beer
Recent Literature
The Auk
Notes and News
The Auk
Correspondence
The Auk
General Notes
Observations of Pellet-casting by Horned and Pied-billed Grebes
Robert W. Storer
The Kestrel (falco Tinnunculus) in the New World
Pere R. Pinchon and Charles Vaurie
Three Further Records of Parasitic Egg Laying by Ducks
Lloyd B. Keith
Night Migration at 4,200 Meters in Venezuela
William H. Phelps
Natural Longevity Record for a Bobwhite
Halsey M. Marsden
Additions to the Guatemalan Bird List
Hugh C. Land and Larry L. Wolf
A Subspecies of Torreornis Inexpectata from Cuba
Matthew J. Spence and Barton L. Smith
First Blue Grosbeak Collected in Ontario
James Woodford and D. H. Baldwin
Unusual Feeding Habit of Boat-tailed Grackle
Charles E. Carter
Duetting by Paired Brown-headed Cowbirds
Hervey Brackbill
Shadow Boxing by Brown-headed Cowbirds
Hervey Brackbill
The Caracara Nesting in Arizona
Seymour H. Levy
Albinism in the Small White-cheeked Geese
Richard E. Marquardt
Covers
Front Matter
The Auk
Back Matter
The Auk