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Contributions of the Conservation Reserve Program to Populations of Breeding Birds in North Dakota

Table 3

Estimated Number of Breeding Pairs (1000's) of Birds in CRP Fields in North Dakota, Estimated Number if CRP were Cropland, Predicted Change in Breeding Pairs, Statewide Number of Breeding Pairs, and Predicted Change as Percentage of Statewide Population, Mean Values for 1992-1993

Species Population in Change Statewide
population Percent
change

CRP Crop

Lark Bunting 210.9 21.2 -189.7 1113.4 -17.0

Grasshopper Sparrow 205.7 12.4 -193.4 945.2 -20.5

Red-winged Blackbird 187.3 17.8 -169.5 1420.9 -11.9

Savannah Sparrow 93.8 10.2 -83.6 445.2 -18.8

Western Meadowlark 80.1 15.8 -64.4 1260.2 -5.1

Brown-headed Cowbird 70.2 17.1 -53.1 663.7 -8.0

Bobolink 72.8 31.2 -41.6 387.9 10.7

Clay-colored Sparrow 54.30 0.3 -54.0 592.9 -9.1

Common Yellowthroat 27.0 0.3 -26.7 285.8 -9.3

Horned Lark 20.1 316.2 296.1 3041.8 9.7

Mourning Dove 17.6 21.6 4.0 737.1 0.5

Sedge Wren 15.8 0.0 -15.8 61.4 -25.8

Vesper Sparrow 15.0 30.2 15.2 661.4 2.3

Baird's Sparrow 10.4 2.3 -8.0 224.7 -3.6

Dickcissel 10.1 1.2 -8.9 52.0 -17.1

Upland Sandpiper 4.2 10.1 5.9 217.2 2.7

Chestnut-collared Longspur 3.1 22.3 19.1 1529.0 1.3

Killdeer 0.8 14.5 13.7 279.8 4.9

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Species	Population in		Change	Statewide population	Percent change
Species	CRP	Crop	Change	Statewide population	Percent change
Lark Bunting	210.9	21.2	-189.7	1113.4	-17.0
Grasshopper Sparrow	205.7	12.4	-193.4	945.2	-20.5
Red-winged Blackbird	187.3	17.8	-169.5	1420.9	-11.9
Savannah Sparrow	93.8	10.2	-83.6	445.2	-18.8
Western Meadowlark	80.1	15.8	-64.4	1260.2	-5.1
Brown-headed Cowbird	70.2	17.1	-53.1	663.7	-8.0
Bobolink	72.8	31.2	-41.6	387.9	10.7
Clay-colored Sparrow	54.30	0.3	-54.0	592.9	-9.1
Common Yellowthroat	27.0	0.3	-26.7	285.8	-9.3
Horned Lark	20.1	316.2	296.1	3041.8	9.7
Mourning Dove	17.6	21.6	4.0	737.1	0.5
Sedge Wren	15.8	0.0	-15.8	61.4	-25.8
Vesper Sparrow	15.0	30.2	15.2	661.4	2.3
Baird's Sparrow	10.4	2.3	-8.0	224.7	-3.6
Dickcissel	10.1	1.2	-8.9	52.0	-17.1
Upland Sandpiper	4.2	10.1	5.9	217.2	2.7
Chestnut-collared Longspur	3.1	22.3	19.1	1529.0	1.3
Killdeer	0.8	14.5	13.7	279.8	4.9