450 



Key to Plate No. 31 Plate No. 31 



WINTER AND AUTUMN PLUMAGES 



(A) MASKED DUCK, adult male. 



(B) MASKED DUCK, adult male wing. 



(C) MASKED DUCK, adult female. 



(D) MASKED DUCK, adult female wing. 



Chief distinguishing features of MASKED DUCK: MALE, (a) Hind toe 

 with lobe, (b) black head, (c) spike-like tail-feathers, (d) white patch on 

 ving. FEMALE, (a) Hind toe with lobe, (b) two black streaks on creamy 

 cheeks, (c) spike-like tail-feathers, (d) white patch on wing. 



(E) FULVOUS TREE DUCK, adult. Sexes alike. 



(F) FULVOUS TREE DUCK, adult wing. 



Chief distinguishing features of FULVOUS TREE DUCK: (a) Hind toe 

 without lobe, (b) breast, huffy-brown, (c) feet, bluish-grey. 



(G) BLACK-BELLIED TREE DUCK, adult. Sexes alike. 



(H) BLACK-BELLIED TREE DUCK, adult wing. 



Chief distinguishing features of BLACK-BELLIED TREE DUCK: (a) 

 Hind toe without lobe, (b) breast black, (c) feet, pinkish-white. 



Downy Young, Plate Xo. 35. 



Text: Masked Duck, page 372; Fulvous Tree Duck, page 376; Black- 

 bellied Tree Duck, page 374. 



