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Contents

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On Maturation of Thayer's Gull
George M. Sutton and David F. Parmelee

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Bird Life at Cape Crozier, Ross Island
David G. Ainley, Robert C. Wood, and William J. Sladen

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Community Ecology of the Helminth Parasites of the Brown Pelican
Stephen R. Humphrey, Charles H. Courtney, and Donald J. Forrester

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Organochlorine Residues and Eggshell Thinning in Wood Storks and Anhingas
Harry M. Ohlendorf, Erwin E. Klaas, and T. Earl Kaiser

Covers

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Back Matter (PDF)
Wilson Bulletin

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Front Matter (PDF)
Wilson Bulletin

General Notes

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Declines in Environmental Pollutants in Olivaceous Cormorant Eggs from Texas, 1970-1977
Michael L. Morrison, R. Douglas Slack, and Edwin Shanley Jr.

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Notes on Food Habits of the Plain Chachalaca from the Lower Rio Grande Valley
Zan D. Christensen, Danny B. Pence, and Gretchen Scott

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An Observation of Polygyny in the Common Yellowthroat
George V. N. Powell and H. Lee Jones