Evaluation of the Bird Conservation Area Concept in the Northern Tallgrass Prairie Annual Report: 1998
Table 2
TABLE 2. Bird density/100 ha (± SE) in small
and large plots in neutral and hostile landscapes, by region.
| Species |
Glyndon Region (south) |
Crookston region (north) |
| Small |
Large |
Small |
Large |
| N=6 |
N=3 |
N=5 |
N=4 |
N=4 |
N=5 |
N=4 |
N=3 |
| Savanna Sparrow |
93.8 ± 24.3 |
72.4 ± 22.4 |
98.1 ± 33.6 |
38.4 ± 4.0 |
186.1 ± 76.3 |
75.8 ± 19.9 |
194.5 ± 18.2 |
65.5 ± 39.6 |
| Clay-colored Sparrow |
57.1 ± 30.3 |
67.0 ± 39.3 |
45.1 ± 21.5 |
74.9 ± 26.0 |
12.5 ± 4.2 |
77.8 ± 24.5 |
28.1 ± 22.3 |
35.0 ± 6.3 |
| Bobolink male |
64.9 ± 20.3 |
13.5 ± 6.8 |
122.1 ± 26.7 |
50.4 ± 17.0 |
41.7 ± 14.4 |
5.3 ± 5.3 |
95.3 ± 19.3 |
22.2 ± 5.5 |
| Le Conte's Sparrow |
20.8 ± 14.6 |
89.9 ± 28.4 |
78.2± 27.1 |
46.1 ± 26.6 |
54.2 ± 26.7 |
34.7 ± 22.1 |
137.5 ± 39.5 |
50.0 ± 28.9 |
| Bobolink female |
41.5 ± 22.3 |
0 |
40.5 ± 12.0 |
13.1 ± 3.3 |
19.4 ± 4.8 |
5.3 ± 5.3 |
56.2 ± 33.5 |
13.3 ± 13.3 |
| Brown-headed Cowbird male |
35.2 ± 16.0 |
30.6 ± 4.3 |
10.5 ± 2.4 |
5.3 ± 1.8 |
11.1 ± 7.8 |
9.1 ± 6.5 |
17.2 ± 3.0 |
2.8 ± 2.8 |
| Sedge Wren |
10.1 ± 5.6 |
14.8 ± 14.8 |
10.7 ± 5.7 |
28.4 ± 22.3 |
16.7 ± 16.7 |
12.0 ± 7.4 |
54.7 ± 21.4 |
22.2 ± 22.2 |
| Red-winged Blackbird |
109.5 ± 25.0 |
0 |
12.1 ± 5.1 |
6.8 ± 2.6 |
33.3 ± 22.6 |
0 |
14.1 ± 6.4 |
8.3 ±8.3 |
| Common Yellowthroat |
29.5 ± 12.2 |
18.5 ± 9.8 |
9.0 ± 6.1 |
12.7 ± 8.8 |
0 |
12.0 ± 7.4 |
3.1 ± 1.8 |
10.5 ± 3.1 |
| Grasshopper Sparrow |
11.1 ± 11.1 |
48.5 ± 48.5 |
34.2 ± 16.3 |
1.7 ± 1.7 |
0 |
0 |
0 |
5.5 ± 5.6 |
| Song Sparrow |
10.0 ± 5.7 |
17.2 ± 9.6 |
17.2 ± 9.6 |
5.8 ± 3.9 |
8.3 ± 4.8 |
0 |
0 |
5.5 ± 2.8 |
| Eastern Kingbird |
7.1 ± 5.5 |
0 |
8.9 ± 4.7 |
8.5 ± 1.7 |
2.8 ± 2.8 |
9.1 ± 6.5 |
1.6 ± 1.6 |
2.78 ± 2.8 |
| American Goldfinch |
1.6 ± 1.6 |
17.2 ± 9.6 |
10.2 ± 4.3 |
7.4 ± 3.4 |
0 |
0 |
6.2 ± 4.4 |
12.8 ± 2.4 |
| Tree Swallow |
0 |
22.2 ± 22.2 |
13.7 ± 13.7 |
7.3 ± 4.3 |
0 |
0 |
4.7 ± 4.7 |
0 |
| Western Meadowlard |
4.6 ± 3.2 |
0 |
13.9 ± 4.5 |
1.6 ± 1.6 |
2.8 ± 2.8 |
0 |
4.7 ± 3.0 |
0 |
| Brewer's Blackbird |
12.5 ± 9.6 |
0 |
6.7 ± 6.7 |
0 |
15.3 ± 10.5 |
0 |
1.6 ± 1.6 |
30.5 ± 30.6 |
| Yellow Warbler |
2.8 ± 2.8 |
11.1 ± 11.1 |
6.5 ± 5.1 |
2.1 ± 2.1 |
0 |
0 |
0 |
7.8 ± 0.5 |
| Brown-headed Cowbird female |
19.6 ± 16.3 |
0 |
1.2 ± 1.2 |
1.6 ± 1.6 |
0 |
0 |
6.2 ± 2.5 |
0 |
| Upland Sandpiper |
1.6 ± 1.6 |
13.5 ± 6.8 |
2.9 ± 1.8 |
0 |
0 |
0 |
1.6 ± 1.6 |
2.8 ± 2.8 |
| Marbled Godwit |
1.6 ± 1.6 |
0 |
7.5 ± 4.6 |
0 |
2.8 ± 2.8 |
0 |
1.6 ± 1.6 |
0 |
| Common Snipe |
2.8 ± 2.8 |
7.4 ± 7.4 |
0 |
0 |
11.1 ± 3.9 |
0 |
4.7 ± 3.0 |
2.8 ± 2.8 |
| Barn Swallow |
2.9 ± 2.9 |
0 |
1.3 ± 1.3 |
7.8 ± 5.9 |
4.2 ± 4.2 |
0 |
4.7 ± 1.6 |
0 |
| Gray Catbird |
0 |
17.2 ± 9.6 |
1.2 ± 1.2 |
2.1 ± 2.1 |
0 |
0 |
0 |
0 |
| Mallard |
1.6 ± 1.6 |
0 |
4.6 ± 3.2 |
0 |
0 |
0 |
1.6 ± 1.6 |
0 |
| Swamp Sparrow |
7.4 ± 5.7 |
0 |
0 |
0 |
4.2 ± 4.2 |
0 |
1.6 ± 1.6 |
0 |
| Bank Swallow |
0 |
0 |
5.0 ± 5.0 |
0 |
69.4 ± 69.4 |
0 |
0 |
0 |
| Greater Prairie-Chicken |
0 |
0 |
5.8 ± 3.6 |
0 |
0 |
0 |
4.7 ± 3.0 |
0 |
| Marsh Wren |
11.2 ± 5.6 |
0 |
0 |
0 |
0 |
0 |
0 |
2.8 ± 2.8 |
| Blue-winged Teal |
11.1 ± 7.0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| Nelson's Sharp-tailed Sparrow |
0 |
0 |
0 |
0 |
8.3 ± 4.8 |
0 |
0 |
0 |
| Sora |
5.7 ± 3.6 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| Killdeer |
0 |
0 |
0 |
0 |
4.2 ± 4.2 |
0 |
0 |
0 |
| Lesser Scaup |
2.9 ± 2.9 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| Willow Flycatcher |
2.8 ± 2.8 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
| Mourning Dove |
0 |
0 |
1.2 ± 1.2 |
0 |
0 |
0 |
0 |
2.8 ± 2.8 |
| Vesper Sparrow |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
2.8 ± 2.8 |
| Chipping Sparrow |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
2.8 ± 2.8 |
| Yellow Rail |
0 |
0 |
0 |
0 |
0 |
0 |
2.1 ± 2.1 |
0 |
| House Wren |
0 |
0 |
0 |
2.1 ± 2.1 |
0 |
0 |
0 |
0 |
| Northern Harrier |
0 |
0 |
0 |
0 |
0 |
0 |
1.6 ± 1.6 |
0 |
| Least Flycatcher |
0 |
0 |
1.3 ± 1.3 |
0 |
0 |
0 |
0 |
0 |
| Henslow's Sparrow |
0 |
0 |
1.2 ± 1.2 |
0 |
0 |
0 |
0 |
0 |
| Brown Thrasher |
0 |
0 |
1.2 ± 1.2 |
0 |
0 |
0 |
0 |
0 |
| Total Number of Species |
28 |
15 |
28 |
20 |
19 |
9 |
23 |
21 |
