Contents
Life History of the Violet-headed Hummingbird
Alexander F. Skutch
The Orientation of Displaced Waterfowl in Migration
Frank C. Bellrose
Some Biological Principles Applicable to Song-behavior
Charles Hartshorne
Pairing Behavior of Pigeons Related to Aggressiveness and Territory
Paul L. Castoro and A. M. Guhl
Nesting Behavior of the Wood Thrush
Hervey Brackbill
Ornithological News
Wilson Bulletin
Ornithological Literature
Wilson Bulletin
Covers
Back Matter (PDF)
Wilson Bulletin
Front Matter (PDF)
Wilson Bulletin
General Notes
Marsh Hawk Takes Prey from Short-eared Owl
Daniel D. Berger
Supernumerary Rectrices in Some Raptors
Daniel D. Berger and Helmut C. Mueller
Data on Relative Heart Size of the Warbling Vireo and Other Passerines from High Altitudes
Francis S. L. Williamson and Robert A. Norris
Nesting Habitat of the Black-bellied Tree Duck in Texas
Brooke Meanley and Ann Gilkeson Meanley
Interspecific Defense of Roost Site by Loggerhead Shrike
Frances M. Williams
Blue Jay Feeding on a Dead Fledgling House Sparrow
Donald H. Lamore
Nesting of the Chimney Swift in Colorado
Owen A. Knorr