METHODS Feathers from 14 different tracts (tables 1 and 2) were compared as to shape, specializations, and pigmentation in adult males and females and immature birds.Particular emphasis was placed on the study of the feathers of interspecific hybrids.The eclipse plumage was studied in live G. sonneratii and in the interspecific hybrid G. sonneratii x G. gallus.
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G. Victor Morejohn (1968) studied this question.
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