Waterfowl Production on the Woodworth Station
in South-central North Dakota, 1965-1981
Table 8. Number of pairs of ducks,
Woodworth Study Area, 1965-81.
Table 8. Number of pairs of ducks, Woodworth Study Area,
1965-1981.
Species |
1965 |
1966 |
1967 |
1968 |
1969 |
1970 |
1971 |
1972 |
1973 |
1974 |
1975 |
1976 |
1977 |
1978 |
1979 |
1980 |
1981 |
Min-Max |
 |
Dabbling ducks |
Mallard |
51 |
52 |
47 |
68 |
37 |
62 |
35 |
66 |
57 |
33 |
65 |
78 |
35 |
61 |
45 |
63 |
40 |
33-78 |
53 |
Gadwall |
92 |
86 |
60 |
67 |
53 |
86 |
48 |
74 |
61 |
61 |
83 |
92 |
41 |
79 |
53 |
66 |
50 |
41-92 |
68 |
Northern pintail |
53 |
32 |
33 |
14 |
28 |
46 |
24 |
28 |
23 |
38 |
43 |
26 |
15 |
41 |
25 |
49 |
13 |
13-53 |
31 |
Green-winged teal |
15 |
10 |
13 |
7 |
12 |
12 |
11 |
12 |
14 |
4 |
6 |
5 |
4 |
8 |
2 |
10 |
8 |
2-15 |
9 |
Blue-winged teal |
261 |
236 |
363 |
248 |
227 |
237 |
117 |
216 |
103 |
234 |
314 |
345 |
83 |
283 |
311 |
144 |
103 |
83-363 |
225 |
Northern shoveler |
53 |
23 |
29 |
26 |
31 |
35 |
15 |
26 |
15 |
16 |
34 |
29 |
14 |
46 |
62 |
36 |
17 |
14-62 |
29 |
American wigeon |
16 |
12 |
14 |
9 |
9 |
15 |
8 |
17 |
16 |
11 |
7 |
6 |
6 |
12 |
6 |
13 |
8 |
6-17 |
11 |
Total dabbling ducks |
541 |
451 |
559 |
439 |
397 |
493 |
258 |
439 |
289 |
397 |
552 |
581 |
198 |
485 |
504 |
381 |
239 |
198-581 |
424 |
Diving ducks |
Redhead |
16 |
18 |
5 |
14 |
16 |
9 |
6 |
7 |
2 |
25 |
35 |
34 |
2 |
35 |
38 |
25 |
13 |
2-38 |
18 |
Canvasback |
22 |
6 |
0 |
2 |
2 |
6 |
1 |
1 |
2 |
2 |
9 |
3 |
4 |
3 |
14 |
18 |
14 |
0-22 |
6 |
Lesser scaup |
19 |
28 |
4 |
13 |
28 |
36 |
17 |
30 |
21 |
32 |
34 |
16 |
22 |
16 |
23 |
31 |
25 |
4-36 |
23 |
Ruddy duck |
40 |
11 |
4 |
9 |
22 |
1 |
1 |
8 |
2 |
43 |
61 |
8 |
7 |
35 |
29 |
15 |
38 |
1-61 |
20 |
Ring-necked duck |
0 |
5 |
2 |
0 |
1 |
2 |
3 |
0 |
2 |
0 |
1 |
2 |
3 |
1 |
1 |
2 |
0 |
0-5 |
1 |
Total diving ducks |
97 |
68 |
15 |
38 |
69 |
54 |
28 |
46 |
29 |
102 |
140 |
62 |
38 |
90 |
105 |
91 |
90 |
15-140 |
68 |
Total pairs |
638 |
519 |
574 |
477 |
466 |
547 |
286 |
485 |
318 |
499 |
692 |
643 |
236 |
575 |
609 |
472 |
329 |
236-692 |
492 |
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