Abstract
Tordoff and Mengel (1956) have summarized a number of findings on the relationship of molt to migration in passerine birds and have concluded that there is strong evidence to support the contention of various authors that molt does influence at least the time of migration. The present study was undertaken to determine whether a correlation could be found between the onset or migration and the completion of molt in Red-winged Blackbirds (Agelaius phoeniceus). As a prerequisite to such a determination, we found it necessary to record the sequence, duration, and completion of molt of each feather tract leading to the Basic or fall and winter plumage. The results of this study are recorded in the following pages. For the sake of completeness we also are showing the succession of molts and plumages acquired by both sexes of Red-winged Blackbirds from juvenal plumage to the Definitive Basic or second winter plumage.
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