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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