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Evaluation of the Bird Conservation Area Concept in the Northern Tallgrass Prairie Annual Report: 1998

Table 3

TABLE 3. Estimates of daily Mayfield nest survival (± SE), number of parasitized nests, and sample size in small and large plots in neutral and hostile landscapes, by region. Species are ordered by the number of nests found for each in each region.
Species Small neutral Small hostile Large neutral Large hostile
May ± SE Cow1 N2 May ± SE Cow N May ± SE Cow N May ± SE Cow N
a) Glyndon Region (south)
Clay-colored Sparrow 0.89 ± 0.03 3 10 0.91 ± 0.02 0 17 0.94 ± 0.02 3 21 0.96 ± 0.01 4 23
Savannah Sparrow 0.97 ± 0.02 2 7 0.94 ± 0.04 0 3 0.94 ± 0.03 1 7 0.89 ± 0.06 1 4
Bobolink 0.96 ± 0.02 4 8     0 0.96 ± 0.02 4 14 1.00 0 3
Mallard 0.94 ± 0.02 0 9 0.64 ± 0.20 0 2     0     0
Upland Sandpiper 1.00 0 1 1.00 0 1 1.00 0 2 0.92 ± 0.07 0 3
Red-winged Blackbird 0.94 ± 0.03 2 6     0     0     0
Song Sparrow     0 0.33 ± 0.38 1 1     0 0.90 ± 0.05 3 4
Brewer's Blackbird 0.93 ± 0.04 2 3 0.77 ± 0.20 1 1     0     0
Western Meadowlark 0.96 ± 0.04 0 2     0 0.28 ± 0.34 0 1     0
Grasshopper Sparrow     0 0.52 ± 0.34 0 1 0.93 ± 0.06 0 2     0
Eastern Kingbird 0.98 ± 0.02 0 2     0 0.71 ± 0.17 1 2     0
Sedge Wren 1.00 0 1     0     0 0.97 ± 0.02 0 2
Blue-winged Teal 0.98 ± 0.01 0 3     0     0     0
Le Conte's Sparrow 0.87 ± 0.09 0 2     0     0     0
Greater Prairie-Chicken     0     0 0.89 ± 0.07 0 2     0
Common Yellowthroat 0.77 ± 0.20 0 1 0.87 ± 0.12 0 1     0     0
Morning Dove 0.94 ± 0.05 0 1     0     0 1.00 0 1
Common Snipe     0 1.00 0 1     0     0
Marbled Godwit     0     0 1.00 0 1     0
All nests   13 56   2 28   9 52   8 40
b) Crookston Region (north)
Savannah Sparrow 0.93 ± 0.04 2 9 0.96 ± 0.02 0 9 0.95 ± 0.02 3 16 0.98 ± 0.02 1 7
Bobolink 0.91 ± 0.06 1 4     0 0.93 ± 0.03 1 12 0.99 ± 0.01 1 7
Clay-colored Sparrow     0 0.96 ± 0.02 0 6 0.98 ± 0.02 0 7 0.93 ± 0.03 0 7
Brewer's Blackbird 1.00 0 10 1.00 0 1     0 1.00 0 1
Red-winged Blackbird 0.76 ± 0.21 1 2     0 0.97 ± 0.02 1 4     0
Le Conte's Sparrow 0.96 ± 0.04 0 2     0 1.00 0 1 0.92 ± 0.08 0 2
Mallard - 0 1 0.95 ± 0.05 0 1 0.94 ± 0.06 0 2 0.85 ± 0.14 0 1
Song Sparrow     0 1.00 0 1 0.89 ± 0.10 0 1     0
Greater Prairie-Chicken     0     0 1.00 0 2     0
Common Snipe 1.00 0 2     0     0     0
Western Meadowlark     0 1.00 0 1     0     0
All nests   4 30   0 19   4 45   2 25
1 Number of parasitized nests
2 Total number of nests

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