Contents
Life History of the White-winged Becard
Alexander F. Skutch
In Memoriam: Clinton Hart Merriam
T. S. Palmer
Plumage Aberrations of the Redwing (agelaius Phoeniceus)
Robert W. Nero
Bird Records and the Aou Check-list Ranges
E. M. Reilly Jr.
The Breeding Biology of Hammond's Flycatcher
David E. Davis
The Tail Molt of Small Owls
Ernst Mayr and Margaret Mayr
Variation in a Flock of the European Starling
Leroy C. Stegeman
Recent Literature
The Auk
Notes and News
The Auk
Obituaries
The Auk
General Notes
Additional Data on the Food of the Whooping Crane
Robert P. Allen
Starlings Nesting at Churchill, Manitoba
Harold Mayfield
Nesting and Food of the Barn Owl (tyro Alba) in Hampshire County, Massachusetts
Elizabeth M. Boyd and Joan Shriner
The Black-crested Titmouse of Trans-pecos Texas
Josselyn Van Tyne
The Yellow-billed Loon (gavia Adamsi) in Colorado
Alfred M. Bailey and Frederick C. Lincoln
Two Species New to the Mexican Avifauna
Raymond A. Paynter Jr.
Aspergillosis, Trichomoniasis, and Drug Therapy in a Gyrfalcon
Robert M. Stabler and Mary Alice Hamilton
Cassin's Kingbird in Canada
L. L. Snyder
Birds and Butterflies or Vice Versa
George W. Rawson
Covers
Front Matter
The Auk
Back Matter
The Auk