Management of Northern Prairies and Wetlands for the Conservation of Neotropical Migratory Birds
Table 1
| Table 1. Migratory statusa and population trendsb (based on BBS results in the Central Region) of birds of the northern prairies. | |||
| PRIMARILY NEOTROPICAL MIGRANTS | |||
| Species | Trend | ||
| 1966-1994 | 1966-1979 | 1980-1994 | |
| Swainson's hawk | 0.9 | 1.3 | 1.6 |
| Upland sandpiper | 2.1 ↑↑↑ | 3.7 ↑↑↑ | 0.3 |
| Burrowing owl | -2.8 | 2.3 | -0.5 |
| Willow flycatcher | NA | NA | NA |
| Western kingbird | 1.1 ↑↑↑ | 1.0 | -0.0 |
| Eastern kingbird | 0.2 | 0.4 | 0.4 |
| Common yellowthroat | -0.9 ↓↓↓ | 1.8 ↑↑↑ | -2.1 ↓↓↓ |
| Dickcissel | -1.0 ↓↓↓ | -4.5 ↓↓↓ | 1.3 ↑↑↑ |
| Clay-colored sparrow | -1.1 | -0.9 | 0.9 |
| Lark bunting | -0.7 | -4.0 ↓↓↓ | 1.1 |
| Baird's sparrow | -0.9 | -4.0 ↓ | -0.5 |
| Grasshopper sparrow | -2.9 ↓↓↓ | -2.6 ↓↓↓ | -1.8 ↓↓ |
| Bobolink | -2.4 ↓↓↓ | -3.2 ↓ | -3.0 ↓↓↓ |
| Yellow-headed blackbird | 0.5 | 3.3 | -2.1 ↓↓ |
| PRIMARILY TEMPERATE MIGRANTS | |||
| Northern harrier | -2.1 ↓↓ | -1.9 | -0.3 |
| Ferruginous hawk | 6.2 ↑↑ | 5.5 | 11.6 ↑↑↑ |
| Killdeer | -0.3 | 3.0 ↑↑↑ | -2.0 ↓↓↓ |
| Willet | -1.8 | 4.7 ↑↑↑ | -0.4 |
| Marbled godwit | 0.7 | 7.9 ↑↑ | --- |
| Short-eared owl | 2.0 | 27.7 ↑ | -0.5 |
| Horned lark | -0.6 | -0.2 | -1.1 ↓↓↓ |
| Sedge wren | 1.3 | -4.1 ↓↓ | 5.7 ↑↑ |
| Marsh wren | 3.6 | -4.9 ↓↓ | 6.7 ↑↑↑ |
| Gray catbird | -1.0 | 0.7 | -0.8 |
| Sprague's pipit | -0.1 | -6.5 ↓↓↓ | 3.0 |
| Loggerhead shrike | -3.1 ↓↓↓ | -4.3 ↓↓↓ | -1.3 ↓↓ |
| Vesper sparrow | 0.4 | 0.3 | 1.1 ↓ |
| Lark sparrow | -3.8 ↓↓↓ | -5.6 ↓↓↓ | -2.8 ↓↓↓ |
| Savannah sparrow | 0.5 | -2.0 | 1.5 |
| Song sparrow | 1.4 ↑↑↑ | -0.2 | 2.8 ↑↑ |
| Swamp sparrow | 1.3 | 6.3 ↑↑↑ | 2.5 |
| McCown's longspur | 3.7 | 11.0 ↑↑ | 5.8 |
| Chestnut-col. longspur | -0.4 | 0.5 | -0.6 |
| Red-winged blackbird | -0.5 ↓↓ | 1.1 ↑↑↑ | -1.3 ↓↓↓ |
| Western meadowlark | -0.3 | -1.1 ↓ | 0.3 |
| Brown-headed cowbird | -0.5 ↓ | 2.5 ↑↑↑ | -0.2 |
| PRIMARILY PERMANENT RESIDENTS | |||
| Greater prairie-chicken | -0.9 | 16.8 ↑↑↑ | 5.4 |
| Sharp-tailed grouse | 3.8 ↑ | 2.7 | 8.0 |
| a Based
primarily on Gauthreaux (1992). b Estimated annual percentage change; ↑ increasing at P<0.10; ↑↑ increasing at P<0.05; ↑↑↑ increasing at P<0.01; ↓ decreasing at P<0.10; ↓↓ decreasing at P<0.05; ↓↓↓ decreasing at P<0.01. |
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