Mean percent occupancy of wet ponds | |||||||||||||
Year n | 1965 | 1966 | 1967 | 1968 | 1969 | 1970 | 1971 | 1972 | 1973 | 1974 | 1975 | ![]() |
|
Species | 344 | 352 | 363 | 362 | 336 | 286 | 267 | 320 | 55 | 368 | 359 | 310 | |
Dabbling ducks | |||||||||||||
Mallard | 8.7 | 11.4 | 11.0 | 12.4 | 6.5 | 12.9 | 9.0 | 12.5 | 52.7 | 6.3 | 11.4 | 10.9 | |
Gadwall | 17.7 | 18.8 | 12.9 | 13.2 | 12.2 | 17.8 | 13.9 | 14.7 | 63.6 | 12.8 | 19.2 | 16.1 | |
American wigeon | 3.2 | 2.3 | 2.8 | 2.2 | 2.1 | 4.5 | 3.0 | 4.1 | 18.2 | 2.2 | 1.7 | 3.0 | |
Green-winged teal | 3.5 | 2.6 | 3.0 | 2.5 | 3.0 | 3.8 | 4.1 | 2.5 | 5.5 | 1.1 | 1.1 | 2.7 | |
Blue-winged teal | 41.3 | 40.3 | 48.8 | 30.7 | 39.6 | 36.0 | 24.7 | 34.1 | 67.3 | 35.9 | 47.4 | 38.7 | |
Northern shoveler | 10.8 | 6.0 | 7.4 | 4.4 | 7.4 | 10.5 | 4.9 | 6.6 | 18.2 | 3.5 | 7.8 | 7.1 | |
Northern pintail | 11.6 | 7.7 | 6.9 | 2.5 | 5.4 | 9.4 | 7.5 | 5.3 | 18.2 | 7.6 | 7.8 | 7.3 | |
Total dabbling ducks | 50.9 | 49.7 | 56.7 | 38.7 | 46.1 | 43.7 | 33.3 | 42.5 | 85.5 | 44.8 | 53.8 | 47.1 | |
Diving ducks | |||||||||||||
Redhead | 2.3 | 2.6 | 0.6 | 1.7 | 2.4 | 2.4 | 1.9 | 0.9 | 3.6 | 2.2 | 5.0 | 2.2 | |
Canvasback | 0.9 | 1.1 | 0.0 | 0.0 | 0.3 | 0.0 | 0.4 | 0.0 | 1.8 | 0.0 | 0.3 | 0.3 | |
Lesser scaup | 2.6 | 1.1 | 0.8 | 1.1 | 2.7 | 3.1 | 2.6 | 3.4 | 14.5 | 2.2 | 1.7 | 2.3 | |
Ring-necked duck | 0.0 | 0.6 | 0.6 | 0.0 | 0.6 | 0.0 | 0.7 | 0.0 | 1.8 | 0.0 | 0.0 | 0.3 | |
Ruddy duck | 1.7 | 1.4 | 0.3 | 0.3 | 1.2 | 0.0 | 0.4 | 0.6 | 3.6 | 2.4 | 3.6 | 1.3 | |
Total diving ducks | 4.9 | 5.4 | 1.9 | 2.8 | 4.8 | 5.2 | 4.9 | 3.4 | 16.4 | 5.2 | 6.7 | 4.7 | |
Total pairs | 51.2 | 50.9 | 57.0 | 39.0 | 46.4 | 44.1 | 33.7 | 42.5 | 85.5 | 45.7 | 54.3 | 47.5 |