Table 30. Densities of upland nests and ducklings hatched in three habitats, Woodworth Study Area, 1966-81. |
Habitat | Ha searched | Nests found | Nest density (nests per 40.5 ha) | Eggs hatched | Ducklings per 40.5 ha |
Native prairie | 5,801 | 2,292 | 16.2 | 6,692 | 47.3 |
Seeded grasslands | 1,787 | 1,455 | 33.4 | 4,585 | 105.2 |
Croplands | 877 | 74 | 3.5 | 153 | 7.2 |
Total | 8,464 | 3,821 | 18.5 | 11,430 | 55.3 |