Northern Prairie Wildlife Research Center
| Table 7. Population trends for breeding grassland birds found at Tallgrass Prairie National Preserve, Kansas, 1998 and 1999. Trends for physiographic region, state, and nation were derived from North American Breeding Bird Survey data. * denotes P 0.05, ** denotes P 0.01, trend is significantly different than zero (Sauer et al. 1999). | |||||||||
| Species | Rolling Red Prairie Region | Kansas | United States | ||||||
| 1966-98 | 1966-79 | 1980-98 | 1966-98 | 1966-79 | 1980-98 | 1966-98 | 1966-79 | 1980-98 | |
| Greater Prairie-Chicken | n/a | n/a | n/a | -5.7 | n/a | -8.2 | 6.2 | 18.2** | -3.8 |
| Northern Bobwhite | 0.1 | 0.8 | -0.6 | -0.8 | -0.8 | 0 | -2.7** | -0.6 | -3.5** |
| Upland Sandpiper | 2.2* | 12.5* | -1.3 | 2.3* | 6.8* | -1.6 | 1.0* | 3.3** | -1.3* |
| Field Sparrow | -3.5* | -4.1 | 0.4 | -0.1 | -3.0 | 3.2* | -3.1** | -5.1** | -2.2** |
| Grasshopper Sparrow | -3.5* | 5.4 | -2.0 | -2.2** | 2.9* | -2.3 | -3.4** | -4** | -2.1** |
| Dickcissel | 0.2 | -0.9 | 0.1 | 0.4 | -1.0 | 1.4** | -1.5** | -4.7** | 0.20 |
| Red-winged Blackbird | 1.6 | 4.8* | 0.4 | -0.1 | 1.7 | -0.5 | -1.0** | 0.6* | -0.9** |
| Eastern Meadowlark | -1.9** | -0.3 | -1.9* | -2.3** | -3.1* | -2.2** | -2.7** | -1.1** | -3.0** |
| Common Grackle | -0.7 | 7.2* | -3.4 | -0.4 | 1.6 | -1.7 | -1.6** | 0 | -2.0** |
| Brown-headed Cowbird | -1.8** | -0.5 | 0.4 | -0.6 | 1.1 | 0.8* | -0.8** | 1.1** | -0.5* |
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://www.npwrc.usgs.gov/resource/birds/tapr/tab7.htm
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