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Waterfowl Production on the Woodworth Station
in South-central North Dakota, 1965-1981

Table 5. Wetland size: average number and area during four survey periods,
Woodworth Study Area, 1965-75.

Table 5. Wetland size: average number and area during four survey periods, Woodworth Study Area, 1965-75.
Size (ha) Mid-May Early June Early July Early August
  n ha n ha n ha n ha
≤0.09 56 3 41 2 23 1 11 1
0.10-0.25 91 16 79 14 45 7 26 5
0.26-0.50 77 28 72 27 45 15 28 11
0.51-0.75 30 18 29 17 22 12 15 9
0.76-1.00 23 20 22 19 16 13 11 9
1.01-2.00 33 45 31 43 23 37 21 30
2.01-5.00 21 64 20 62 19 55 16 48
5.01-10.00 3 20 3 19 3 17 2 16
10.01-25.00 9 148 9 147 9 147 8 136
≥25.01 4 168 4 168 4 168 4 168
Total 347 530 310 518 209 472 142 433
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