SCAUP DUCK; BLUEBILL. 



148. Marila mania. 18 in. 



Head with slight greenish gloss. Other- 

 wise black and white as shown. Female 

 similar to Redhead but with white speculum, 



Range. Breeds from X. Dak. northward. 

 Winters from Me., Ont. and Alaska south. 

 LESSER SCAUP DUCK (not figured). 



149. Marila affinis. 17 in. 



Very similar to the last species but head 

 glossed with purple. 



Range. Breeds north from Ind. and Wash. 

 Winters south from X. J. and Lake Erie. 

 Most common on fresh water, the preceding 

 on salt. 



RING-NECKED DUCK. 



150. Marila collaris. 17 in. 



Head glossed with purple. Chestnut col- 

 lar about neck. Back wholly black. Female 

 with white eye-ring and cheeks. 



Range. Breeds north from la. and Cal. 

 Winters south from X. J., Ill and Wash. 

 43 



