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Ecological Overlap and the Problem of Competition and Sympatry in the Western and Hammond's Flycatchers
Donald L. Beaver and Paul H. Baldwin

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Distributional Ecology and Habits of Some Bougainville Birds (solomon Islands)
Jared M. Diamond

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Social Interactions in Flocks of Courting Wilson's Phalaropes (phalaropus Tricolor)
Marshall A. Howe

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Patterns of Growth in Birds. Iii. Growth and Development of the Cactus Wren
Robert E. Ricklefs

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Reproductive Biology of the White-crowned Sparrow (zonotrichia Leucophrys Pugetensis Grinnell) I. Temporal Organization of Reproductive and Associated Cycles
Robert A. Lewis

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Life Style of Coccyzus Pumilus, a Tropical Cuckoo
Carol Pearson Ralph

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Raptor Predation on Wintering Shorebirds
G. Page and D. F. Whitacre

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Foraging Behavior of the Starling (sturnus Vulgaris) in Maryland
Penelope Williamson and Lincoln Gray

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News and Notes
The Condor

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Selected Recent Publications
The Condor

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The Bulletin Board
The Condor

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Back Matter (PDF)
The Condor

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Front Matter (PDF)
The Condor

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Iris Coloration in Young Bushtits
Stephen Ervin

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Clutch Size of the Spruce Grouse, Canachites Canadensis Franklinii, in Southwest Alberta
Daniel M. Keppie

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Quantification of Nocturnal Passerine Migration with a Portable Ceilometer
Kenneth P. Able and Sidney A. Gauthreaux Jr.

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Range Extensions and New Records for Bird Species in Ecuador, Peru, and Bolivia
David L. Pearson

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Intraspecific Agonistic Behavior of Ospreys (pandion Haliaetus)
Gary J. Schroeder and Wayne E. Melquist

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Arctic Terns from the Phoenix Islands and at Sea in the Central Pacific
Roger B. Clapp

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Notes on Southwestern Costa Rican Birds
Lloyd F. Kiff

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The Surface Area of an Egg
A. R. Shott and F. W. Preston

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Bank Swallow (riparia Riparia), Bobolink (dolichonyx Oryzivorus), and Other Birds at a Desert Reservoir in Chile
Thomas R. Howell

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Notes on Unusual and Rare Birds of St. Croix
Charles F. Leck