Northern Prairie Wildlife Research Center
| Class I | Class II | Class III | 17-year mean, all classes | |||||||||
| Species | July | August | July and August | July | August | Julu and August | July | August | July and August | July | August | July and August |
| Dabbling ducks | ||||||||||||
| Mallard | 6.3 | 6.1 | 6.2 | 5.4 | 5.5 | 5.5 | --b | 5.7 | 5.7 | 5.9 | 5.7 | 5.8 |
| Gadwall | 8.1 | 6.4 | 7.3 | 7.8 | 6.9 | 7.0 | -- | -- | -- | 8.0 | 6.6 | 7.2 |
| American wigeon | 7.9 | 5.0 | 7.3 | -- | 5.6 | 5.6 | -- | 6.0 | 6.0 | 7.9 | 5.5 | 6.6 |
| Green-winged teal | 7.0 | 4.8 | 5.5 | -- | 6.3 | 6.3 | -- | 4.0 | 4.0 | 7.0 | 5.1 | 5.4 |
| Blue-winged teal | 7.5 | 5.2 | 6.9 | 7.7 | 5.6 | 6.7 | 6.5 | 5.8 | 5.9 | 7.6 | 5.6 | 6.7 |
| Northern shoveler | 6.7 | 4.4 | 5.8 | 6.3 | 5.3 | 5.7 | 7.5 | 4.4 | 5.0 | 6.6 | 4.9 | 5.6 |
| Northern pintail | 9.3 | 3.0 | 6.6 | 4.3 | 3.3 | 3.9 | 1.0 | 4.5 | 3.8 | 5.3 | 3.6 | 4.4 |
| Total dabbling ducks | 7.6 | 5.8 | 6.9 | 7.3 | 5.8 | 6.5 | 6.3 | 5.6 | 5.7 | 7.4 | 5.8 | 6.6 |
| Diving ducks | ||||||||||||
| Redhead | 7.7 | 6.0 | 6.6 | 6.7 | 5.2 | 5.6 | -- | 3.7 | 3.7 | 7.5 | 5.6 | 6.2 |
| Canvasback | 5.5 | 5.0 | 5.4 | 4.8 | 4.7 | 4.7 | -- | 3.4 | 3.4 | 5.0 | 4.5 | 4.7 |
| Lesser scaup | 8.0 | 6.5 | 7.0 | -- | 7.9 | 7.9 | -- | -- | -- | 8.0 | 7.4 | 7.5 |
| Ring-necked duck | 8.0 | 4.0 | 6.0 | 10.0 | 5.5 | 7.0 | -- | 8.0 | 8.0 | 9.0 | 5.8 | 6.8 |
| Ruddy duck | 4.9 | 5.2 | 5.1 | 6.8 | 3.7 | 4.0 | -- | 5.7 | 5.7 | 5.2 | 4.5 | 4.7 |
| Total diving ducks | 6.2 | 5.7 | 5.9 | 5.4 | 5.5 | 5.5 | -- | 4.4 | 4.4 | 5.9 | 5.5 | 5.6 |
| Total broods | 7.4 | 5.7 | 6.7 | 7.1 | 5.8 | 6.3 | 6.3 | 5.5 | 5.6 | 7.2 | 5.7 | 6.4 |
U.S. Department of the Interior |
U.S. Geological Survey
URL: http://www.npwrc.usgs.gov/resource/birds/wpwood/table40.htm
Page Contact Information: Webmaster
Page Last Modified: Friday, 01-Feb-2013 20:09:34 EST
Menlo Park, CA [caww54]
