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Bird Populations and Environmental Changes: Can Birds Be Bio-indicators?
Stanley A. Temple and John A. Wiens

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Gone Forever a Contemporary Look at the Extinction of the Passenger Pigeon
David E. Blockstein and Harrison B. Tordoff

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Field Identification of Smaller Sandpipers Within the Genus calidris
Richard R. Veit and Lars Jonsson

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Military Macaws in Guatemala
Chris Wille

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Profile of a Pioneer: P. A. Taverner
Henri Ouellet

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Career Opportunities in Ornithology
E. H. Dunn, C. J. Ralph, C. Van Riper III, K. G. Smith, D. S. Wood, and F. B. Gill

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Red-naped Sapsuckers Feeding at Willows: Possible Keystone Herbivores
Paul R. Ehrlich and Gretchen C. Daily

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Patterns of Population Decline in Birds
David S. Wilcove and John W. Terborgh

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Vocalizations and Territorial Behavior of Wintering Snowy Owls
David L. Evans

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Conservation of Tropical Rain Forest Birds: a Case Study from Costa Rica
F. Gary Stiles and Deborah A. Clark