140 IOWA ACADEMY OF SCIENCE Vol. XXV. 1918 



of a tlock of six noted on the Goose ponds March 31, 1915 It 

 was probably a more or less regular migrant through the county 

 lut did not appear in any numbers. 



20. Marila marila. Scaup Duck. The writer lias only spring 

 records for this duck and few of them, altliougli it undoubtedly 

 occurred more frequently than these records show. One male 

 w^as collected April 4, 1914, on the Goose ponds and a number 

 were observed there on March 29 and 31, 1915. Except under 

 favorable conditions it is not easy to distinguish this duck from 

 the lesser scaup, and as a consequence this bird probably escaped 

 notice many times. 



21. Marila a/finis. Lesser Scaup. The lesser scaup was 

 found commonly as a spring migrant from March 13 to i\Iay 11. 

 In the fall it appeared in smaller numbers from October 22 to 

 November 14. On March 13, 1913, a female was secured from 

 the roof of the Court House in Marsballtown. This bird had 

 struck the tower the previous night and had been killed. Two 

 others were collected on the Goose ponds April 19, 1913. As a 

 spring migrant the lesser scaup was most abundant during the 

 last week in March. 



22. Marila collaris. Ring-necked Duck. The ring-necked 

 duck or "Black Jack" was a regular spring migrant, but did 

 not appear in any numbers except in 1915, when it was common 

 from March 27 to March 31. The earliest date for the spring 

 migration was IMarch 21, 1913, when several were secured bv 

 hunters, and the latest was May 1, 1914, when a single male 

 was seen on the river near the Country Club. 



On April 25, 1915, a male was observed on the Goose ponds. 

 When this bird saw the writer it submerged and swam with 

 only the bill and eyes visible until out of gunshot when it rose 

 from the water and flew away. My only fall records are of a 

 pair which were seen on the Cemetery pond October 23, 1913, 

 and a single bird seen Octobpr 31 in the same place. A female 

 was secured March 31, 1914. and a pair March 31. 1915. All 

 three were taken on the Goose ponds. 



23. Cla/ngula clangula americaiui. Golden-eye. The onl\' 

 record for this species is of seven birds se^mred out of a flock bv 

 hunters on Decemlier 6, 1913. 



24. Chnrlionetta aJhrola.. Bufflehejid. A male l)ufflehoad was 

 noted on the river near the Counti-y Club on March 31, 1913. 



