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Hormonal Control and Development of the Incubation Patch in Icterids, with Notes on Behavior of Cowbirds
Robert K. Selander and Linda L. Kuich

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Relationships Between the Birds of Paradise and the Bower Birds
Walter J. Bock

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Social Organization and Behavior of the Mexican Jay
Jerram L. Brown

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The Breeding Behavior of the Blue-black Grassquit
Cora C. Alderton

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Notes and News
The Condor

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Back Matter (PDF)
The Condor

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Front Matter (PDF)
The Condor

First Records for the Ruddy-tailed Flycatcher and Purple-crowned Fairy Hummingbird from Mexico
Delwyn G. Berrett

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A Short-tailed Albatross Sighted Off the Oregon Coast
Bruce Wyatt

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Census of Ring-billed and California Gull Colonies in Eastern Washington
W. C. Hanson

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Parula Warbler Again in California
Gordon L. Bolander

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Breeding Nighthawks in Central America
Eugene Eisenmann

A Rose Goose in New Mexico
David M. Niles

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Unusual Occurrence of the Dipper in Washington
Gerald J. Bakus

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The Occurrence of the Ruff in California
R. G. Mccaskie

Sight Records of Willets in Alaska
Willet T. Van Velzen

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Cooper Hawk Attacks Pigeon by Stooping
Rodney A. Mead