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Contents

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Molecular Assessment of the Taxonomic Status of Cox's Sandpiper
Les Christidis, Kizanne Davies, Michael Westerman, Peter D. Christian, and Richard Schodde

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Organization of Agonistic Vocalizations in Black-chinned Hummingbirds
Kathryn M. Rusch, Carolyn L. Pytte, and Millicent S. Ficken

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Book Reviews
The Condor

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News and Notes
The Condor

Cover

Short Communications

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Inerspecific Aggression by Yellow Warblers in a Sun Coffee Plantation
Russell Greenberg, Robert Reitsma, and Andrea Cruz Angon

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Variable Expression of Sexually Mosaic Plumage in Female Lesser Kestrels
Jose L. Tella, Jose A. Donazar, and Fernando Hiraldo

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Black Brant from Alaska Staging and Wintering in Japan
Dirk V. Derksen, Karen S. Bollinger, David H. Ward, James S. Sedinger, and Yoshihiko Miyabayashi