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Avian Use of Sheyenne Lake and Associated Habitats in Central North Dakota

Tables


Table 1. Climatological characteristics during 1980 at the Sheyenne Lake Study Area, compared with the norm.
Month and feature 1980 Normal Percentage deviation
April Precipitation (cm) Trace 3.58 - 100
Temperature (°C) 9.2 5.1 + 44.6
May Precipitation (cm) 3.37 6.09 - 44.7
Temperature (°C) 16.3 12.0 + 26.4
June Precipitation (cm) 15.6 8.89 + 43.0
Temperature (°C;) 18.8 17.2 + 8.51

 

Table 2. Total area, proportional distribution, and area censused of habitat types of the Sheyenne Lake Study Area.
Habitat type Area (ha) Percent of study area Area censused (ha) Percent of habitat sampled
Uplands Cropland 3,872.5 47.1 421.7 10.9
Native prairie 1,941.3 23.6 460.4 23.7
Shelterbelt 170.0 2.1 5.3 3.1
Subtotal 5,983.8 72.8 887.4  
Wetlands Ephemeral 46.5 0.6 ª  
Wet meadow 572.5 6.9 86.7 15.1
Seasonal 222.7 2.7 23.8 10.7
Semipermanent 249.8 3.0 19.5 7.8
Permanent 697.9 8.5 75.5 10.8
Alkali 207.7 2.5 43.9 21.1
Prairie thicket 237.6 2.9 19.3 8.1
Subtotal 2,234.7 27.1 268.7  
Grand total 8,218.5 99.9 1,156.1 14.0
ªEphemeral wetlands were dry throughout the study period and were not censused.

 

Table 3. Breeding population among major bird orders on the Sheyenne Lake Study Area,1980. Densities are compared with statewide means described in Stewart and Kantrud (1972).
Order Breeding population Density (pairs/km²)
Study area Statewide
Podicipediformes 254 3.08 a
Ciconiformes 98 1.19 0.34
Anseriformes 3,501 42.60 12.47
Falconiformes 10 0.12 0.49
Galliformes 35 0.42 0.39
Gruiiformes 541 6.60 4.57
Charadriiformes 1,002 12.20 5.60
Columbiformes 1,371 16.67 3.50
Piciformes 73 0.88 0.67
Passeriformes 14,757 179.73 113.05
ªNo data available.

 

Table 4. Population estimates of major bird species on the Sheyenne Lake Study Area, in 1980, compared with statewide means described in Stewart and Kantrud (1972).
Species Population estimate and HPDª interval Density (pairs/km²)
Study area Statewide
Red-winged blackbird 2,855 (1,963-3,747) 34.77 11.44
Yellow-headed blackbird 1,904 (1,194-2,615) 23.19 1.11
Mourning dove 1,371 (897-1,845) 16.69 3.50
Blue-winged teal 1,052 (369-1,736) 12.48 3.72
Brown-headed cowbird 845 (552-1,138) 10.29 5.47
Horned lark 812 (613-1,011) 9.89 14.90
Clay-colored sparrow 645 (414-875) 7.85 4.34
Gadwall 636 (213-1,057) 7.75 1.19
Grasshopper sparrow 616 (388-844) 7.50 3.51
Chestnut-collared longspur 599 (369-830) 7.29 13.44
Mallard 594 (323-867) 7.23 2.59
Western kingbird 572 (199-946) 6.96 1.22
Eastern kingbird 529 (367-692) 6.44 1.94
Common yellow-throat 436 (272-599) 5.31 1.60
Western meadowlark 414 (343-485) 5.04 10.97
Savannah sparrow 395 (264-526) 4.81 6.23
Long-billed marsh wren 373 (152-595) 4.54 b
Yellow warbler 359 (173-546) 4.37 1.32
Brown thrasher 355 (91-619) 4.32 0.49
Northern shoveler 353 (93-613) 4.30 b
Pintail 330 (175-485) 4.02 2.09
Black tern 314 (0-609) 3.82 1.48
Bobolink 312 (152-471) 3.80 2.57
Common grackle 305 (49-562) 3.71 1.86
American goldfinch 299 (122-475) 3.64 1.28
Sora 298 (181-416) 3.62 0.35
Lark bunting 247 (57-436) 3.00 7.21
Killdeer 234 (114-355) 2.85 1.25
Song sparrow 233 (150-317) 2.83 0.65
American coot 225 (65-386) 2.74 4.18
Ruddy duck 188 (26-349) 2.29 b
Wilson's phalarope 186 (0-386) 2.26 0.94
Barn swallow 177 (73-280) 2.15 1.17
Gray catbird 174 (0-351) 2.12 0.58
Least flycatcher 165 (28-300) 2.00 b
Willow flycatcher 154 (95-213) 1.87 0.34
ªHighest probability density.
bNo data available.

 

Table 5. Population characteristics of breeding waterfowl at the Sheyenne Lake Study Area, 1980.
Species Study area Mean (pairs/km²)ª
Projected population Density (pairs/km²) Statewide Physiographic region
Dabblers Mallard 594 7.23 2.8 2.1
Gadwall 636 7.74 1.9 1.6
Pintail 330 4.01 2.8 2.9
American Wigeon 10 0.11 0.3 0.5
Green-winged teal 71 0.86 0.7 0.9
Blue-winged teal 1,052 12.8 5.3 2.6
Northern shoveler 353 4.29 1.5 1.4
Subtotal 3,046 34.04 15.3 12.0
Diving Ducks Redhead 141 1.71 0.7 0.5
Canvasback 77 0.93 0.2 0.04
Lesser Scaup 27 0.32 0.1 0.07
Ring-necked duck 13 0.16 0.07 0.04
Ruddy duck 188 2.29 0.6 0.5
Subtotal 446 5.41 1.67 1.15
Canada goose 9 0.11 b b
Grand total 3,501 42.56 16.97 13.15
aAfter Stewart and Kantrud (1974)
bNo data available.

 

Table 6. Ecological distribution of breeding waterfowl at the Sheyenne Lake Study Area, 1980.
Wetland class No. of species No. of breeding pairs Percent of total breeding pairs Statewide mean percentª
Seasonal 6 364 10.4 42
Semi-permanent 8 923 26.4 27
Permanent 13 1,551 44.3 3
Alkali 10 663 18.9 <0.5
  Totals   3,501 100.0  
ªStewart and Kantrud 1973.

 

Table 7. Characteristics of breeding bird populations in the major habitat types, Sheyenne Lake Study Area, 1980.
Habitat Species richness Mean density (pairs/km²) Estimated breeding bird population Species diversity (H') Species equitability (J')
Shelterbelt 24 2,658.7 4,521 3.7498 0.8178
Semipermanent wetland 22 1,357.8 3,393 3.4142 0.7656
Prairie thicket 19 878.5 2,089 3.5839 0.8436
Seasonal Wetland 25 574.0 1,279 3.4750 0.7483
Permanent wetland 36 527.4 3,683 4.2761 0.8270
Alkali wetland 17 450.8 937 3.3297 0.8146
Wet meadow 19 319.7 1,832 3.1988 0.7530
Upland native prairie 20 142.2 2,763 3.3695 0.7796
Cropland 13 33.6 1,301 2.2607 0.6109

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