Observations on sexing and aging ducks using wings

This report presents information on the development, testing, and limitations of procedures described in the report titled: "Species, age and sex identification of ducks using wing plumage" (Carney 1992). Studies of duck wings begin in 1958 led to the development of most of these procedures (Carney and Geis 1960, Carney 1964) and the details of the development and functioning of the annual Waterfowl Parts Collection Survey have been presented elsewhere (Martin and Carney 1977, Carney 1984, Crissey 1984) and are not included here.