37 



KEY TO WATERFOWL (Cont.) 



21' Wing coverts brown; secondaries only washed with blue. 



HARLEQUIN DUCK, female 



22 Secondaries not distinctively colored but secondary coverts white. 23 

 22' Secondaries distinctively colored. 24 



23 Tertials dark. KING EIDER, male 

 23' Tertials light. SPECTACLED EIDER, male 



24 Speculum (secondaries) pearl gray, compared to brownish primaries. 25 

 24' Speculum largely black, white or brown tipped with white. 28 



25 Forehead sloping; bill elongated, as long as head, and slim (Plate 

 14b-2). 26 



25' Forehead abrupt; bill short, broad (half as wide as long) (Plate 



14b-3). 27 



26 Head and neck chestnut; breast black. CANVASBACK, male 

 26' Head, neck and breast brown. CANVASBACK, female 



27 Head and neck chestnut; breast black. REDHEAD, male 

 27' Head, neck and breast brown. REDHEAD, female 



28 Speculum dark or mostly dark. 29 

 28' Speculum with much white. 



29 Greater coverts and outer secondaries black, inner secondaries and 

 tertials white. COMMON EIDER, male 



29' Secondaries and greater secondary coverts brown, tipped with white. 30 



