TABLE E-21.--Lone drake index, long-term trend, 
North Dakota, South Dakota, and western 
Minnesota, 1959-63 
Percent of 
total 








Percent 
change 
from 1955- 
| 62 average 
Number of adult pairs 
Species 1961 1962 | 1963 






















Ducks: 
Dabblers: 
Mallerd-----<«-«+-- 31,539 | 21,918 + 73.9 
Gadwall---~------ 884 | 6,6 + 35.7 
American widgeon- + 82.0 
Teal ---e-nenene-- p + 30.7 
Shoveler--------- 1,199 2,580l|- 57.6 - 8&6 
Pintail~--------- 3,653 | 13,893 | 20,506|//4+ 47.6 } +106.1 
Divers: 
Redhead-----~-=--- - 60.6 
Canvasback------- + 35.7 
Scaup----s----=== rae 
Goldeneye-------- + 85.8 
Ruddy duck---=-~=-- “= 
Miscellaneous: 
Merganser ---~---~== 4127.3 
Unidentified------- +124.8 
ee ae ee a ee a ae - 61.6 


pa ee ne ee 
122 
