TABLE B~36. —Waterfowl breeding population indexes by species and stratum, tri- 
State area, (North Dakota, South Dakota, and Minnesota) 1965 
[Index numbers in thousands] 
Stratum 
Total 
Average 
Percent change 
Species 
1959- 
iru 
mi— 
East 
Central 
West 
1964 
1965 
1965 
1964 
Average 
Ducks: 
Dabblers: 
Mallard- 
115 
171 
56 
293 
342 
294 
+ 16.7 
+ 16.3 
Gadwall- 
29 
89 
11 
59 
130 
71 
+120. 3 
+ 83.0 
American 
widgeon - 
1 
— 
3 
1 
9 
- 66.6 
- 88.8 
Green-winged 
teal - 
Blue-winged teal 
101 
171 
17 
309 
290 
224 
- 6.1 
+ 29.5 
Shove ler- 
30 
65 
3 
66 
98 
97 
+ 4.5 
+ 1.0 
Pintail. 
36 
35 
12 
86 
83 
138 
- 5.8 
- 39.9 
Subtotal- 
314 
532 
98 
816 
944 
829 
+ 15.7 
+ 13.9 
Divers: 
Redhead - 
21 
30 
45 
52 
28 
+ 15.6 
+ 85.7 
Canvasback — 
18 
11 
— 
21 
29 
14 
+ 38.0 
+107. 1 
Scaup- 
9 
20 
5 
5 
34 
32 
+580.0 
+ 6.3 
Ring-necked 
duck- 
2 
Ruddy duck- 
3 
3 
— 
2 
6 
8 
+200.0 
- 25.0 
Subtotal —•— 
52 
65 
5 
73 
121 
84 
+ 65.8 
+ 44.0 
Total ducks — 
365 
597 
103 
889 
1,065 
913 
+ 19.8 
+ 16.6 
Coots- 
67 
72 
— 
67 
139 
99 
+ 107.5 
+ 40.4 
Grand total — 
432 
669 
103 
956 
1,204 
1,012 
+ 20.6 
+ 19.0 
67 
