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The Daily Energy Requirements of a Wild Anna Hummingbird
Oliver P. Pearson

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Rediscovery of the Nesting of the Dark-rumped Petrel in the Hawaiian Islands
Frank Richardson and David H. Woodside

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The Annual Gonad and Thyroid Cycles of the English Sparrow in Southern California
John Davis and Betty Shuck Davis

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Social Organization and Behavior in a Flock of Captive, Nonbreeding Red Crossbills
Harrison B. Tordoff

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Nesting and Feeding of the Black Oyster-catcher near Monterey, California
Ken Legg

Notes and News
The Condor

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Cooper Society Meetings
The Condor

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Index to Volume 56
The Condor

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Front Matter (PDF)
The Condor

Toxostoma Ocellatum and Diglossa Baritula in Hidalgo
Robert J. Newman

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Willet Nesting in the Central Sierra Nevada, California
William K. Kirsher

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Another Record of the Painted Redstart in Southern California
John D. Goodman

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Additional and New Bird Records for Utah
Richard D. Porter

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Nomenclature of the Black-throated Sparrows of Chihuahua and Western Texas
Alden H. Miller

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Notes on the Occurrence of Birds in Chiapas, Mexico
Miguel Alvarez Toro

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Male Red-shafted Flicker at Nest Hole
John Blackford