Northern Prairie Wildlife Research Center
| Table 2. Faunistic composition and total population composition of breeding birds in North Dakota (Stewart 1975). | ||
| Avifauna | Composition by species | Composition by population |
| North-central North America (mixed-grass) | 56 (29%) | 80% |
| Eastern North America 1 (mostly woodland) | 71 (37%) | 13% |
| Western North America 1 | 37 (19%) | 6% |
| Northern North America | 31 (16%) | 1% |
| 1 Five species are included in both eastern and western avifaunas. | ||
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://www.npwrc.usgs.gov/resource/habitat/neobird/table2.htm
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