Waterfowl Production on the Woodworth Station
in South-central North Dakota, 1965-1981
Table 20. Percent of upland nests by duck species and top concealment,
Woodworth Study Area, 1966-81.
Table 20. Percent of upland nests by duck species and top concealment, Woodworth Study Area, 1966-81.
| Nests | Vegetation top concealment | |||
| Species | n | None | Half coverage | Total coverage |
| Mallard | 323 | 23 | 48 | 28 |
| Gadwall | 608 | 20 | 47 | 34 |
| Northern pintail | 182 | 51 | 39 | 11 |
| Green-winged teal | 54 | 7 | 48 | 44 |
| Blue-winged teal | 1,972 | 14 | 54 | 32 |
| Northern shoveler | 169 | 23 | 55 | 22 |
| American wigeon | 55 | 18 | 53 | 29 |
| Lesser scaup | 53 | 11 | 67 | 21 |
| Total | 3,416 | 18 | 52 | 30 |
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