Waterfowl Production on the Woodworth Station
in South-central North Dakota, 1965-1981
Table 25. Probable causes of upland nest losses among ducks,
Woodworth Study Area, 1966-81.
Table 25. Probable causes of upland nest losses among ducks, Woodworth
Study Area, 1966-81.
Species |
Red Fox |
Striped skunk |
Ground squirrel |
Gull |
Raccoon |
Badger |
Mink-weasel |
Cow |
Mallard |
91 |
20 |
17 |
6 |
12 |
3 |
2 |
0 |
Gadwall |
167 |
52 |
18 |
6 |
13 |
14 |
1 |
0 |
American wigeon |
18 |
4 |
0 |
1 |
1 |
1 |
0 |
0 |
Green-winged teal |
8 |
8 |
1 |
1 |
1 |
1 |
0 |
0 |
Blue-winged teal |
610 |
260 |
33 |
21 |
23 |
6 |
0 |
3 |
Northern shoveler |
57 |
19 |
3 |
1 |
0 |
0 |
0 |
0 |
Northern pintail |
51 |
9 |
6 |
4 |
1 |
3 |
0 |
0 |
Leser scaup |
11 |
5 |
0 |
0 |
2 |
0 |
0 |
0 |
Total |
1,013 (64%) |
377 (24%) |
78 (5%) |
40 (3%) |
53 (3%) |
28 (2%) |
3 (<1%) |
3 (<1%) |
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