
ABSTRACT 
This paper describes characters in the wing plumage that are 
useful for determining age and sex of most common species of ducks. 
Each species is discussed briefly, and a key outlining a logical 
order in which to examine age and sex characters is presented. This 
report was prepared in response to requests for information and 
should be considered a preliminary report on work in progress. A 
more complete report elaborating upon the material presented here 
and incorporating new findings will be published later. 
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