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Autumnal Premigratory and Migratory Periods in the Chaffinch (fringilla Coelebs Coelebs) and Some Other Temperate-zone Passerine Birds
Victor R. Dolnik and Tatyana I. Blyumental

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The Patterns of Downy Grebes
Robert W. Storer

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Breeding Birds of the Sandia Mountains and Their Ecological Distributions
John L. Tatschl

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Diurnal Feeding Patterns in White-crowned Sparrows, Zonotrichia Leucophrys Gambelii
Martin L. Morton

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The Puzzling Vocal Repertoire of the South American Collared Jay, Cyanolyca Viridicyana Merida
John William Hardy

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Observations on the Feeding Habits of Some Woodpeckers and Woodcreepers in Costa Rica
Imre S. Otvos

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News and Notes
The Condor

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Back Matter (PDF)
The Condor

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Front Matter (PDF)
The Condor

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A New Swallow from the Fox Canyon Local Fauna (upper Pliocene) of Kansas
J. Alan Feduccia

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The Common Loon in Sonora, Mexico
Dale A. Zimmerman and John W. Boettcher

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Rhymchopsitta Terrisi is Probably a Valid Species: a Reassessment
John William Hardy

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The Temporary Establishment of Dominance Between Two Hand-raised Juvenile Cactus Wrens (carnpylorhynchus Brunneicapillus)
Robert E. Ricklets and F. Reed Hainsworth

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A Case of Classical Conditioning in Nestling Cactus Wrens
Robert E. Ricklets

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Nocturnal Feeding of Sterna Fuscata and Puffinus Pacificus
Patrick I. Gould

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Feeding Helpers among Immature White-eyes
C. Robert Eddinger

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Diving Wood Duck Ducklings Entangled in Filamentous Algae
Paul A. Stewart

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The Occurrence and Possible Breeding of Mckay's Bunting on St. Lawrence Island, Alaska
Spencer G. Sealy

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Sharp-tailed Grouse Relations to a Food Source near a Dancing Ground
Lawrence J. Blus