8 BIRDS OF NORTH DAKOTA 



30144. Wood-duck. Aix sponsa. 



I know of but one specimen taken here. A male in moulting plumage 

 was shot in August by Roy Thompson on Rock Lake. 



31146. Redhead. Aythya amerieana. 



Tolerably common summer resident. On all the larger lakes nests are 

 found in the thick grass and rushes that grow to from one to three feet 

 of the water. First arrivals noted first week in April. Full sets of eggs 

 found first week in June. 



32147. Canvas-back. Aythya Tallisneria. 



Tolerably common. A few pair breed near the deeper water holes, in 

 the coulees and small sloughs. First seen, third week in April. Full sets of 

 eggs found June 16. 



33 148. American Scaup Duck. Aythya niarilannearctica. 



Common. Early spring and late fall migrant. 



A Desirable Companion When Collecting 

 Water-loving Birds 



34149. Lesser Scaup Duck. Aythya affinis. 



Common. Breeds in all large lakes and sloughs. First migrants in 

 spring seen April 15 to 23 for several years. First nests found second week 

 in June. Have found eggs of this species in same nest with those of other 

 ducks, including Redhead, Ruddy, Blue-winged Teal and others. Whether 

 they preempted the nests of other species, shared in the cares of incubation 

 of the same or left them to the mercies of the other species, was never deter- 

 mined. 



35150. Ringed-necked Scaup. Aythya collaris. 



Rare. One pair seen in Big Coulee. Found breeding in Turtle Mountains. 



36 151. American Golden-eye. Glaucionetta claugula americann. 



Tolerably common at Graham's Island, Devils Lake. Rare straggler to 

 prairie waters. Found breeding in Turtle Mountains. 



37153. Buffle-head. Charitonetta albeola. 



Rare. Sometimes seen and shot during migrations. 



