Northern Prairie Wildlife Research Center
| Table 3. Mean number of indicated breeding pairs in 128 randomly selected quarter-sections in North Dakota by year, migration strategy, and preferred breeding habitat. | |||
| Migration strategy | Mean pairs/100 ha | ||
| 1967 | 1992 | 1993 | |
| Permanent resident | 2.6 | 5.7 | 6.1 |
| Short-distance migrant | 95.5 | 74.7 | 99.5 |
| Long-distance migrant | 43.2 | 52.3 | 45.4 |
| Breeding habitat | |||
| Wetland/wet meadow | 37.5 | 24.7 | 32.6 |
| Grassland/open habitat | 71.7 | 59.3 | 68.3 |
| Open habitat with trees | 5.5 | 10.6 | 9.7 |
| Shrubland | 7.2 | 7.5 | 9.0 |
| Woodland/woodland-edge | 15.6 | 24.6 | 25.3 |
| Residential/generalist | 3.7 | 5.7 | 5.8 |
| Other | 0.1 | 0.3 | 0.3 |
| Total | 141.3 | 132.7 | 151.0 |
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://www.npwrc.usgs.gov/resource/habitat/neobird/table3.htm
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