Contents
Mating Performance of the Sage Grouse
James R. Simon
Social Nesting Habits of Guira Guira
David E. Davis
Light and Molt in Weaver Finches
Frank A. Brown Jr. and Marie Rollo
Factors Affecting Length of Incubation
S. Charles Kendeigh
Sarcocystis in Birds
Arnold B. Erickson
Anting' by the Song Sparrow
Margaret M. Nice and Joost Ter Pelkwyk
Wintering of the Greater Snow Geese
William Johnston Howard
A Collection of Seventeenth-century Drawings
Albert E. Lownes
Canadian Status of the Long-tailed Chickadee
P. A. Taverner
New Birds from Southern Mexico
Pierce Brodkorb
Oriental Forms of Picus Canus
J. C. Greenway Jr.
Recent Literature
The Auk
Conservation Notes
Francis H. Allen
Obituaries
The Auk
Index to Volume 57
The Auk
General Notes
Yellow-crowned Night Heron Nesting in Salem County, New Jersey
Richard F. Miller
The American Bittern as a Stake-driver
Francis H. Allen
Greater Snow Goose at Philadelphia
Edward J. Reimann
Snow Geese in the Pennsylvania Appalachians
Thomas Smyth
Fulvous Tree-duck an Addition to the Avifauna of Florida
Alexander Sprunt Jr.
King Eider in Ohio
Chester K. Brooks
American Rough-legged Hawk in Florida
Alexander Sprunt Jr.
Golden Eagle Reported Nesting in Ontario
L. L. Synder
A Bud-eating Ring-necked Pheasant
A. Heaton Underhill
Eskimo Curlew Record Corrected
W. E. Scott
Northern Skua in Massachusetts
David L. Garrison
Laughing Gull Breeding in Nova Scotia
L. L. Snyder
Caspian Tern in Haiti
Frederick C. Lincoln
An American Caspian Tern in England
Frederick C. Lincoln
Great Auk in the Isle of Man
G. N. Carter
Immature Smooth-billed Ani in Florida in 1897
David E. Davis
Mortality of Barn Owls at Champaign, Illinois
J. Murray Speirs
Great Horned Owls Dying in the Winter of 1939-40
J. Kenneth Terres
A Definite Age Record of a Horned Owl
Emerson A. Stoner
Western Burrowing Owl in Western Missouri
Dix Teachenor
Muscle Atrophy in a Crow
Leonard J. Uttal
An Albinistic Robin
Charles H. Knight
Brewer's Blackbird in Florida
R. C. Hallman
Mimicry by a Brown Thrasher
W. L. Mcatee
Brewer's Blackbird in Florida
Thos. D. Burleigh and George H. Lowery Jr.
Dickcissel at Bar Harbor, Maine
Maurice Sullivan
Brewer's Blackbird in Alabama
Frederick J. Ruff
European Goldfinch in New York
William Montagna
Red Crossbill in the West Virginia Mountains
William A. Lunk and Maurice Brooks
Lark Sparrow in Maine
Robert C. Mcclanahan
Recent Records from Lake Ontelaunee, Pennsylvania
Earl L. Poole
Covers
Front Matter
The Auk
Back Matter
The Auk