57 

 59. Aythya affinis (Eyt.). Lesser Scaup. 



Breeding Range — Chiefly north of U. S. 

 Winter Distribution — Southward to Guatemala. 



Common winter visitant, so generally confused with the preceding 

 that it is hard to determine their relative abundance. 



Dr. Warren states on the authority of Dr. Van Fleet that a pair of 

 this species were noted all summer for two seasons in Northumber- 

 land county, Pa., which would indicate that they occasionally breed. 



60. Aythya collaris (Donov.). Ring'-necked Duck. 



Breeding Range— Northern border of U. S. northward. 

 Winter Distribution — Southward to Guatemala. 



Not very common on bays and larger rivers, early November to 

 March. 



61. Glaucionetta elanffula ajiiericana ( Bonap. ). 

 Golden-eye. Whistler. 



Breeding Range — Maine, northward. 



Winter Distribution — Southward to Cuba and Mexico. 



Common transient and winter visitant, last week of October to 

 April 1, on coast and large rivers. 



62. Charitonetta alheola (Linn.). Bufile-head. But- 

 ter-ball. 



Breeding Range — Far northward. 



Winter Distribution — Southward to Cuba and Mexico. 



Very common all winter on coast, bays, and up the larger rivers, 

 November 1 to April 15. 



63. Clangula Jiyemnlis (Linn.). Old-squaw. Long'-tail. 



Breeding Range — Northern parts of Northern Hemisphere. 

 Winter Distribution — Southward to Chesapeake Bay. 



Abundant winter resident along the coast and occasionally inland 

 along the large rivers. Occurs from late in October to the middle of 

 April. 



