Mean percent occupancy of wet ponds with perimeter length (m) | |||||||||
Perimeter length | ≤100 | 100-249 | 250-499 | 500-749 | 750-999 | 1,000-1,999 | 2,000-5,000 | ≥5000 | |
Species | Average no. ponds per year | 8 | 43 | 97 | 71 | 30 | 43 | 15 | 3 |
Dabbling ducks | |||||||||
Mallard | 2.2 | 1.5 | 4.0 | 9.3 | 13.8 | 21.4 | 48.5 | 60.6 | |
Gadwall | 0.0 | 2.8 | 6.9 | 14.9 | 21.6 | 29.1 | 67.1 | 78.8 | |
American wigeon | 0.0 | 0.6 | 0.9 | 1.5 | 3.6 | 4.9 | 18.0 | 36.4 | |
Green-winged teal | 0.0 | 0.4 | 1.4 | 2.1 | 3.3 | 4.7 | 11.4 | 21.2 | |
Blue-winged teal | 18.7 | 13.6 | 27.7 | 37.8 | 52.7 | 63.0 | 88.6 | 93.9 | |
Northern shoveler | 2.2 | 0.9 | 3.1 | 4.4 | 9.0 | 14.5 | 34.1 | 39.4 | |
Northern pintail | 2.2 | 0.9 | 3.3 | 6.3 | 10.2 | 15.6 | 23.4 | 39.4 | |
Total dabbling ducks | 22.0 | 17.9 | 35.3 | 47.8 | 65.0 | 73.5 | 95.2 | 97.0 | |
Diving ducks | |||||||||
Redhead | 0.0 | 0.0 | 0.1 | 1.0 | 2.4 | 3.0 | 18.0 | 45.5 | |
Canvasback | 0.0 | 0.0 | 0.0 | 0.1 | 0.0 | 0.6 | 1.8 | 12.1 | |
Lesser scaup | 0.0 | 0.2 | 0.3 | 0.5 | 1.8 | 2.8 | 20.4 | 51.5 | |
Ring-necked duck | 0.0 | 0.0 | 0.1 | 0.1 | 0.0 | 0.2 | 0.0 | 18.2 | |
Ruddy duck | 0.0 | 0.0 | 0.0 | 0.1 | 0.6 | 0.6 | 18.0 | 24.2 | |
Total diving ducks | 0.0 | 0.2 | 0.5 | 1.5 | 4.5 | 6.6 | 40.7 | 84.8 | |
Total pairs | 22.0 | 18.1 | 35.4 | 48.3 | 65.3 | 74.6 | 96.4 | 100.00 |