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The Frontal Shield of the American Coot

Gordon W. Gullion
The Wilson Bulletin
Vol. 63, No. 3 (Sep., 1951), pp. 157-166
Stable URL: http://www.jstor.org/stable/4157968
Page Count: 10
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
The Frontal Shield of the American Coot
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Abstract

The frontal shield plays an important role in the life of the American Coot. Paired birds recognize one another at least in part by means of shield-shape and -size, and the social behavior of birds can be predicted from the size of the shield. Since territory defense and enlargement of the frontal shield are synchronous phenomena, it seems probable that both result from the same stimulus. Furthermore, the secretions governing shield-growth and territorial behavior are apparently also involved in migratory and sexual behavior.

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