44 ANSERES : Lamellirostral Swimmers 



LESSER SCAUP DUCK 



(149. Marila affinis) 17 in. 



Male: Whole fore parts black; back gray ("vermiculated" 

 white and black); sides lighter; belly white; iris bright yellow. 

 In strong sunlight the back sometimes looks almost white, and 

 the white of the flanks is very conspicuous in the field. 



Female: Brown; white about base of bill; speculum white. 



The common " little Blue-bill" of the sportsman. A " chubby" 

 Duck, not identifiable in the field from its slightly larger 

 relative; less widely distributed, but in greater numbers. 



RING-NECKED DUCK 



(150. Marila collaris) 17 in. 



Male: Black, except gray speculum, white chin, white breast 

 and black-and-white-waved sides. Neck narrowly ringed with 

 chestnut or brown, rarely visible in the field. Bill slaty, ringed 

 near tip and at base with pale blue; tip black. 



Female: Dark brown above; lighter below; a white band next 

 to bill, and white ring around eye. 



The unique bill pattern is a safe identification mark. 



RUDDY DUCK 



(167. Erismatura jamaicensis) 14 in. 



Male: Sides of head white; crown and nape black; otherwise 

 neck and upper parts rich chestnut; breast and belly silky gray 

 (like " watered silk"); bill blue. On the water often holds tail 

 stiffly erect, spread fan- wise, hence the popular name, " Wire- 

 tail." 



Female and Young: Grayish-brown above; silky gray below; 

 cheeks white. 



WOOD DUCK See Appendix. 



(144. Aixsponsa) 19 in. 



SCAUP DUCK See Appendix. 



(148. Marila marila) 18 in. 



