564 Visher, Birds of Sanborn County, South Dakota. [bet. 



from their nesting sites. — Tor example, we saw thorn one summer many 

 times near Forestburg, though 1 believe none of them then nested within 

 twenty miles. 



id. Sterna forsteri. Fobster's Tern. — Occasionally common dur- 

 ing migrations 



11. Sterna hirundo. Common Tern. — Frequent in migrations. 



12. Hydrochelidon nigra surinamensis. Black Tern. — Breeds 

 abundantly on all marshes and lakes, arrives April 20, departs in October. 



13. Phalacrocorax auritus auritus. Double-crested Cormo- 

 rant. — ■ A tolerably common migrant during April and October. 



14. Pelecanus erythrorhynchos. White Pelican. — An abundant 

 migrant, passing in large Bocks during April and late September and 



October. 



15. Mergus americanus. Merganser. — A rather rare migrant. 



16. Mergus serrator. Red-breasted Merganser. — A common 



migrant. 



17. Lophodytes cucullatus. Hooded Merganser.— A common 



migrant, especially numerous along the Dakota river. 



IS. Anas platyrhynchos. MaIiLARD. — A very abundant migrant, 

 and quite common as a breeder. Nests found. Mallards are occasionally 

 seen late in February, but are not very abundant until late in March. 



19. Anas rubripes. Black Duck. — A rare migrant. 



20. Chaulelasmus streperus. Oadwall. — A tolerably common 

 migrant and probably a rare breeder. 



21. Mareca americana. Baldtate. — Abundant during migrations 

 and tolerably common in summer. 



22. Nettion carolinense. Green-winged Teal. — Abundant mi- 

 grant and occasionally a rare breeder. Arrives early in April and early 

 in September. Departs early in May and in November. 



23. Querquedula discors. Blue-winged Teal. — An abundant 

 migrant and summer resident. By far the most abundant duck during 

 the summer. Breeds on all ponds and bayous of rivers. Arrives late in 

 April and leaves in November. 



24. Querquedula cyanoptera. Cinnamon Teal. — Tolerably com- 

 mon in the spring of 1001. Ordinarily a rare bird. 



2.">. Spatula clypeata. Shoveller. — An abundant summer resident. 

 Arrives about April first but not conspicuously abundant until the middle 

 of the month. 



20. Dafila acuta. Pintail. — The Pintail or "spike-tail" is the 

 earliest duck. Until late in March it is the predominant species. It is a 

 common breeder also. 



27. Aix sponsa. Wood Duck. — Only a few pairs breed along the 

 Dakota river in this county. 



28. Marila americana. Bedhead. — An abundant migrant and a 

 fairly common breeder. Arrives late in March and leaves late in October 

 or November. 



