Contents
Observations of Seabirds during a Cruise from Ross Island to Anvers Island, Antarctica
Robert M. Zink
Display Behavior of Ovenbirds (seiurus Aurocapillus) Ii. Song Variation and Singing Behavior
M. Ross Lein
The Mayfield Method of Estimating Nesting Success: a Model, Estimators and Simulation Results
Gary L. Hensler and James D. Nichols
Narrowly Disjunct Allopatry Between Black-capped and Carolina Chickadees in Northern Indiana
Peter G. Merritt
Toe Fusion in Oscines
George A. Clark Jr.
Environmental Effects on Roosting Behavior of Chimney Swifts
Richard M. Zammuto and Edwin C. Franks
Ornithological Literature
Wilson Bulletin
Ornithological News
Wilson Bulletin
Covers
Back Matter (PDF)
Wilson Bulletin
Front Matter (PDF)
Wilson Bulletin
General Notes
Observation of a Brood of Sharp-shinned Hawks in Ontario, with Comments on the Functions of Sexual Dimorphism
Helmut C. Mueller, Nancy S. Mueller, and Patricia G. Parker
Food Deprivation and Temperature Regulation in Nestling Ferruginous Hawks
Diana F. Tomback and Joseph R. Murphy
Aerial Play of Black Vultures
Walter A. Thurber
The Shoulder-spot Display in Ruffed Grouse
Allan Garbutt
The Agonistic Repertoire of Sandhill Cranes
Stephen A. Nesbitt and George W. Archibald
Notes on the Slender Antbird
Edwin O. Willis and Yoshika Oniki
Notes on the Uniform Crake in Costa Rica
F. G. Stiles
Trichomoniasis in Bald Eagles
Ward B. Stone and Peter E. Nye
Protocalliphora Infestation in Broad-winged Hawks
Scott Crocoll and James W. Parker
Herring Gull Attacks and Eats Adult Male Oldsquaw
Richard R. Snell
Red-legged Kittiwakes Forage in Mixed-species Flocks in Southeastern Alaska
Douglas Siegel-Causey and Thomas E. Meehan
American Coot Distribution and Migration in Colorado
Warner P. Gorenzel, Ronald A. Ryder, and Clait E. Braun
Migration Speeds of Three Waterfowl Species
Frank C. Bellrose and Robert C. Crompton