434 



Key to Plate No. 23 Plate No. 23 



WINTER PLUMAGES 



(A) STELLER'S EIDER, adult male. 



(B) STELLER'S EIDER, adult male wing. 



(C) STELLER'S EIDER, adult female. 



(D) STELLER'S EIDER, adult female wing. 



Chief distinguishing features of STELLER'S EIDER: MALE, (a) Hind 

 toe with lobe, (b) white head, with black throat and neck; black ring 

 around eye, (c) some scapulars, secondaries, and tertials greatly elongated, 

 (d) white wing-coverts. FEMALE, (a) Hind toe with lobe, (b) speculum 

 bordered in front and behind with white bars. 



(E) EASTERN HARLEQUIN DUCK, adult male. 



(F) EASTERN HARLEQUIN DUCK, adult male wing. 



(G) EASTERN HARLEQUIN DUCK, adult female. 



(H) EASTERN HARLEQUIN DUCK, adult female wing. 



(J) WESTERN HARLEQUIN DUCK, adult male head. 



Chief distinguishing features of EASTERN HARLEQUIN DUCK: MALE. 



(a) Hind toe with lobe, (b) sides, rich reddish-brown, (c) slaty-blue plu- 

 mage, marked with many white spots and stripes, (d) small size. FEMALE. 



(a) Hind toe with lobe, (b) two small and one large white spot on side of 

 head, (c) entire upper surface, including wings, solid olive brown, with no 

 white feathers, (d) breast, mottled greyish brown. 



Chief distinguishing features of WESTERN HARLEQUIN DUCK: MALE. 

 Same as for Eastern Harlequin except that the chestnut stripes on each 

 side of the crown do not extend so far forward, and their colour is not so 

 rich. FEMALE. Identical with female Eastern Harlequin Duck. 



Eastern Harlequin in autumn plumage, Plate No. 21. 

 Downy Young, Steller's Eider, Plate No. 34. 

 Downy Young, Harlequin Duck, Plate No. 35. 



Text: Steller's Eider, page 296; Eastern Harlequin Duck, page 287; 

 Western Harlequin Duck, page 292. 



