Contents
The Incubation Patch of Passerine Birds
Robert E. Bailey
A Nesting of the Double-toothed Kite in Panama
Robert M. Laughlin
Experiments on the Mating Behavior of the Brewer Blackbird
Thomas R. Howell and George A. Bartholomew Jr.
Reactions of Poor-wills to Light and Temperature
Joseph Brauner
Some Birds of Northwestern Sonora, Mexico
Allan R. Phillips and Dean Amadon
Cooper Club Meetings
The Condor
Notes and News
The Condor
Covers
Back Matter (PDF)
The Condor
Front Matter (PDF)
The Condor
From Field and Study
Franklin Grouse, a Photograph
Robert T. Orr
Striped Cuckoo Fed by Rufous-and-white Wren in Panama
Frederick W. Loetscher Jr.
The Arizona Crested Flycatcher in Nevada
Warren M. Pulich
Feeding Behavior of Golden Plover in Captivity
Laidlaw Williams
The Earliest Name of the Korean Tree Sparrow
H. G. Deignan
Comments on the Check-list of the Birds of Idaho
Malcolm Jollie
Song in Hand-reared Birds
Loye Miller
Current Status of the Starling in North-central Colorado
R. G. Beidleman
Additional Bird Records for Nevada
Fred G. Evenden Jr.
The Types of Lambrecht's Fossil Bird Genera
Pierce Brodkorb
Occurrence of the Skua in Southern California
William R. Lasky