Contents
Hyperphagia and Social Behavior of Canada Geese Prior to Spring Migration
M. Robert Mclandress and Dennis G. Raveling
A Multiple Sensor System for Monitoring Avian Nesting Behavior
James A. Cooper and Alan D. Afton
Foraging Speeds of Warblers in Large Populations and in Isolation
Douglass H. Morse
Differential Passerine Density and Diversity Between Newfoundland and Offshore Gull Island
Monique I. Vassallo and Jake C. Rice
Environmental Influence on Soaring in Wintering Red-tailed Hawks
Charles R. Preston
Breeding Success in an Isolated Population of Rock Doves
David E. Preble and Frank H. Heppner
Relative Abundance of Georgia Caprimulgids Based on Call-counts
Robert J. Cooper
Non-drumming Males in a Ruffed Grouse Population
Gordon W. Gullion
Ornithological Literature
Wilson Bulletin
Report of the Conservation Committee--1980
Wilson Bulletin
Covers
Back Matter (PDF)
Wilson Bulletin
Front Matter (PDF)
Wilson Bulletin
General Notes
Courtship Feeding and Copulation of Royal Terns
Lawrence Kilham
Two Cases of Commensal Feeding Between Passerines
Mark B. Robbins
Food Finding in Black-capped Chickadees: Altruistic Communication?
Millicent S. Ficken
The Sentinel Crow as an Extension of Parental Care
Globia M. D'Agostino, Lorraine El Giovinazzo, and Stephen W. Eaton
Behavior of a Male Least Bittern Incubating After Loss of Mate
B. T. Aniskowicz
Notes on Brown Pelicans in Puerto Rico
Ralph W. Schreiber, David W. Belitsky, and Bruce A. Sorrie
Eggs of the Marbled Murrelet
Lloyd F. Kiff
First Documented Cinnamon Teal Nesting in North Dakota Produced Hybrids
John T. Lokemoen and David E. Sharp
First Record of the Black-chinned Hummingbird in Alberta
Philip H. R. Stepney and Peter C. Boxall