Species, Age and Sex Identification of Ducks Using Wing Plumage

Ruddy Duck

Wing Character Adult     Immature    
Tertial covertsBroadly rounded at tipsSomewhat squared at tips, appearing trapezoidal
TertialsBroad-tipped, curved and droopingStraight, often somewhat frayed at their tips
Middle covertsRounded and smooth-edgedSlightly trapezoidal, often rough-ended

JPG-Adult ruddy duck JPG-Immature ruddy duck

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