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An Experimental Analysis of the Breeding Cycle of the Tricolored Red-wing
John T. Emlen

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Birds of the St. Joe National Forest, Idaho
R. L. Hand

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Non-genetic Mating Preference as a Factor in Evolution
John E. Cushing

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Experiments on the Color Preference of Black-chinned Hummingbirds
Frank Bene

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The California Shrike in the Northwest Coastal Belt
John W. Slipp

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Notes and News
Alden H. Miller

Minutes of Cooper Club Meetings
Frances Carter and Irwin D. Nokes

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Back Matter (PDF)
The Condor

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Front Matter (PDF)
The Condor

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Young California Black Rails
Lewis W. Walker

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Occurrence of the Flammulated Screech Owl at Lake Tahoe, California
Milton S. Ray

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Yellow-billed Magpies on Coastal Slope of Santa Barbara County, California
Richard M. Bond

A Race of the Poor-will from Sonora
A. J. Rossem

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Ancient Murrelet in Northern Idaho
Chas. Foote Hedges

Rock Wren Nesting in a Petrified Log
Lloyd Mason Smith

Cliff Swallow Colonies of the Central Sacramento Valley in 1941
John T. Emlen

Robin Nesting at Pacific Grove, California
Laidlaw Williams

Man-o'-war-bird in Santa Barbara County, California
Richard M. Bond

Black-headed Grosbeak Nesting at Fresno, California
Richard H. Boyer

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Inland Record for the White-winged Scoter
Milton Moore and Donald Moore

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The Thick-billed Kingbird of Northern Sonora
A. J. Rossem

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Racial Determination of Bewick Wrens in the Western Great Basin Region
Alden H. Miller