USGS - science for a changing world

Northern Prairie Wildlife Research Center

  Home About NPWRC Our Science Staff Employment Contacts Common Questions About the Site

Species, Age and Sex Identification of Ducks Using Wing Plumage

Harlequin Duck

Wing Character Male Female
Adult Immature Immature Adult
Tertials Distal three are mostly white on their outerwebs and their tips are not frayed Distal three are dark brown; paler near their shafts; usually frayed at their tips; sometimes an adult-type replacement permits sex identification Dark gray; blunt and their tips are not frayed
Secondaries Very dark iridescent blue Dark brown; often appear ragged Black, shading to gray; tips smoothly rounded and not frayed
Greater coverts Two or three have large white spots; all are dark blue Dark brown; often slightly faded; may appear ragged Black, shading to dark gray; tips smoothly rounded and not frayed
Middle and lesser coverts Most are dark blue; usually three have white spots Dark brown; tips are usually ragged Black-tipped; shading to dark gray on bases of coverts

JPG-Adult male harlequin duck JPG-Adult female harlequin duck JPG-Immature harlequin duck

Previous Section -- Wood duck
Return to Contents
Next Section -- Steller's eider

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo logo U.S. Department of the Interior | U.S. Geological Survey
Page Contact Information: Webmaster
Page Last Modified: Friday, 01-Feb-2013 19:15:46 EST
Sioux Falls, SD [sdww54]