Waterfowl Production on the Woodworth Station
in South-central North Dakota, 1965-1981
Table 7. Percent species composition of pairs of ducks,
Woodworth Study Area, 1965-81.
Table 7. Percent species compostion of pairs of ducks, Woodwoth Study
Area, 1965-81.
Species |
1965 |
1966 |
1967 |
1968 |
1969 |
1970 |
1971 |
1972 |
1973 |
1974 |
1975 |
1976 |
1977 |
1978 |
1979 |
1980 |
1981 |
Min-Max |
 |
Dabbling ducks |
Mallard |
8 |
10 |
8 |
14 |
8 |
11 |
12 |
14 |
18 |
7 |
9 |
12 |
15 |
11 |
7 |
13 |
12 |
7-18 |
11 |
Gadwall |
14 |
17 |
11 |
14 |
11 |
16 |
17 |
15 |
19 |
12 |
12 |
14 |
17 |
14 |
9 |
14 |
15 |
9-19 |
14 |
Northern pintail |
8 |
6 |
6 |
3 |
6 |
8 |
8 |
6 |
7 |
8 |
6 |
4 |
6 |
7 |
4 |
10 |
4 |
3-10 |
6 |
Green-winged teal |
2 |
2 |
2 |
2 |
3 |
2 |
4 |
3 |
4 |
1 |
1 |
1 |
2 |
1 |
<1 |
2 |
2 |
1-4 |
2 |
Blue-winged teal |
41 |
46 |
63 |
52 |
49 |
43 |
41 |
45 |
32 |
47 |
45 |
54 |
35 |
49 |
51 |
31 |
31 |
31-63 |
46 |
Northern shoveler |
8 |
4 |
5 |
6 |
7 |
6 |
5 |
5 |
5 |
3 |
5 |
5 |
6 |
8 |
10 |
8 |
5 |
3-10 |
6 |
American wigeon |
3 |
2 |
2 |
2 |
2 |
3 |
3 |
4 |
5 |
2 |
1 |
1 |
3 |
2 |
1 |
3 |
2 |
1-5 |
2 |
Total dabbling ducks |
84 |
87 |
97 |
92 |
85 |
90 |
90 |
91 |
91 |
80 |
80 |
90 |
84 |
84 |
83 |
81 |
73 |
73-97 |
86 |
Diving ducks |
Redhead |
3 |
4 |
1 |
3 |
3 |
2 |
2 |
1 |
1 |
5 |
5 |
5 |
1 |
6 |
6 |
5 |
4 |
1-6 |
4 |
Canvasback |
3 |
1 |
0 |
<1 |
<1 |
1 |
<1 |
<1 |
1 |
<1 |
1 |
1 |
2 |
<1 |
2 |
4 |
4 |
0-4 |
1 |
Lesser scaup |
3 |
5 |
1 |
3 |
6 |
7 |
6 |
6 |
7 |
6 |
5 |
3 |
9 |
3 |
4 |
7 |
8 |
1-9 |
5 |
Ruddy duck |
6 |
2 |
1 |
2 |
5 |
<1 |
<1 |
1 |
1 |
9 |
9 |
1 |
3 |
6 |
5 |
3 |
12 |
<1-12 |
4 |
Ring-necked duck |
0 |
1 |
<1 |
0 |
<1 |
<1 |
1 |
0 |
1 |
0 |
<1 |
<1 |
1 |
<1 |
<1 |
<1 |
0 |
0-1 |
<1 |
Total diving ducks |
15 |
13 |
3 |
8 |
15 |
10 |
10 |
9 |
9 |
20 |
20 |
10 |
16 |
16 |
17 |
19 |
27 |
3-27 |
14 |
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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