Comparison of age determination techniques for female northern pintails and American wigeon in spring

Wildlife Society Bulletin
By:  and 

Links

Abstract

Accurate age-class determination of waterfowl is necessary for studies addressing age-specific effects (e.g., Serie et al., 1992) and age structure of populations (e.g., Raveling and Heitmeyer 1989). Duck ages can be determined in fall by morphological and color characteristics of tertial and tail feathers (Carney 1992); however, these feathers are replaced during fall and winter, thus their characteristics cannot be used in spring (Dane 1968). Other methods used to determine waterfowl age include the presence or absence of the bursa of Fabricius (hereafter bursa; Gower 1939, Hochbaum 1942, Hanson 1949) and characteristics of primary and secondary wing feathers and their coverts (e.g., Wishart 1981, Duncan 1985).

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Comparison of age determination techniques for female northern pintails and American wigeon in spring
Series title Wildlife Society Bulletin
Volume 22
Issue 2
Year Published 1994
Language English
Publisher Wiley
Contributing office(s) Alaska Science Center
Description 5 p.
First page 260
Last page 264