Contents
Notes on the Harpy Eagle in British Guiana
James M. Fowler and James B. Cope
Yearly Fluctuations in a Population of Purple Martins
Harold Mayfield
Cold-hardiness of the Newly Hatched Young in Relation to Ecology and Distribution in Ten Species of European Ducks
Jukka Koskimies and Lauri Lahti
The Status of Frantzius' Nightingale Thrush
J. Stuart Rowley and Robert T. Orr
Some Effects of Prolactin on Reproductive Behavior in the Brown-headed Cowbird (molothrus Ater)
Gerald G. Robinson and Dwain W. Warner
In Memoriam: Robert Thomas Moore
Herbert Friedmann
A Study of the Prairie Falcon in the Central Rocky Mountain Region
James H. Enderson
Occurrence and Migration of Certain Birds in Southwestern California
R. Guy Mccaskie and Richard C. Banks
Breeding Behavior and Taxonomic Relationships of the Curlew Sandpiper
Richard T. Holmes and Frank A. Pitelka
Behavior of Captive South American Cowbirds
Robert K. Selander
The Use of D 2 O 18 for Measuring Energy Metabolism in Columba Livia at Rest and in Flight
Eugene A. Lefebvre
Special Review Mr Todd and the Birds of Labrador
Oliver L. Austin Jr.
Recent Literature
The Auk
Notes and News
The Auk
Corrigenda
The Auk
General Notes
Extra Helpers Feeding Young of Blue-winged and Golden-winged Warblers
Lester L. Short Jr.
Notes on the Horned Larks of Western Minnesota and the Great Plains
Robert W. Dickerman
A Specimen of Fuertes' Oriole, Icterus Fuertesi, from Texas
Robert W. Dickerman
Red-billed Tropicbird on Long Island, New York
John L. Bull
Tyrannus Melancholicus Using a Partially Domed Nest
Gecrge L. Hunt Jr.
Red-tailed Hawk Preys on Black-tailed Rattlesnake
Roger D. Johnson
Birds Associated with Elephants and Hippopotamuses
A. Landsborough Thomson
Birds Associating with Ungulates
Constantine W. Benson
Fulmar Taken in Virginia
Paul W. Sykes Jr.
A Congenitally One-legged Cowbird
Reginald D. Manwell
First House Finch Collected in North Carolina
Eloise Fretz Potter
Notes on the Birds of Webb County, Texas
Lewis W. Oring
Some Records from Bermuda Affecting the Aou Check-list
David B. Wingate
Ancient Murrelet Taken in Illinois
Terry Balding
Covers
Front Matter
The Auk
Back Matter
The Auk