Northern Prairie Wildlife Research Center
| Table 6. Density (pairs/km²) and percent composition (%) of duck breeding pairs in the Waubay study area, Day County, South Dakota, 1992-1993, 1951, 1953, and 1950-1953. | |||||||||||
| Species | Indicated Pair Densities (Percent composition) | ||||||||||
| 1951a | 1953b | 1951 & 1953 Avg. |
1950-53 | 1992 | (%) | 1993 | (%) | 1992-93 | |||
| Avg. | (%) | Avg. | (%) | ||||||||
| Dabbling ducks | |||||||||||
| Mallard | 3.3 | 2.8 | 3.1 | 3.4 | (13.4) | 7.3 | (23.7) | 7.7 | (20.3) | 7.5 | (22.0) |
| Gadwall | 3.9 | 3.9 | 3.9 | 3.9 | (15.5) | 4.7 | (15.2) | 4.1 | (11.0) | 4.4 | (13.1) |
| Northern pintail | 2.5 | 1.5 | 1.9 | 2.4 | (9.7) | 0.6 | (2.3) | 1.5 | (3.9) | 1.1 | (3.1) |
| Green-wing teal | 0.2 | 0.1 | 0.1 | 0.1 | (0.5) | 0.2 | (0.8) | 0.3 | (0.7) | 0.3 | (0.8) |
| Blue-wing teal | 11.9 | 12.3 | 12.1 | 11.8 | (47.3) | 10.8 | (35.0) | 16.5 | (43.5) | 13.7 | (39.3) |
| Northern shoveler | 1.1 | 0.8 | 0.9 | 0.9 | (3.6) | 1.8 | (5.8) | 1.9 | (5.0) | 1.9 | (5.4) |
| American wigeon | 0.2 | 0.2 | 0.2 | 0.2 | (0.9) | 0.1 | (0.2) | tr. | (0.0) | tr. | (0.1) |
| Total Dabblers | 23.1 | 21.6 | 22.2 | 22.7 | (90.8) | 25.5 | (82.3) | 32.0 | (84.2) | 28.9 | (83.8) |
| Diving ducks | |||||||||||
| Redhead | 0.8 | 0.8 | 0.8 | 0.8 | (3.2) | 3.7 | (12.0) | 4.3 | (11.3) | 4.0 | (11.7) |
| Canvasback | 0.2 | tr. | 0.1 | 0.2 | (0.6) | 0.3 | (0.9) | 0.3 | (0.8) | 0.3 | (0.9) |
| Lesser scaup | 0.4 | 0.5 | 0.5 | 0.4 | (1.6) | 0.3 | (0.9) | tr. | (0.1) | 0.2 | (0.5) |
| Ruddy duck | 0.6 | 1.4 | 1.0 | 0.9 | (3.6) | 0.8 | (2.7) | 1.3 | (3.5) | 1.1 | (3.1) |
| Total Divers | 2.0 | 2.7 | 2.4 | 2.3 | (9.2) | 5.1 | (16.5) | 5.9 | (15.5) | 5.6 | (16.2) |
| Othersc | 0.1 | 0.2 | 0.1 | tr. | 0.2 | (0.6) | 0.1 | (0.2) | 0.2 | (0.6) | |
| Total | 25.2 | 24.4 | 24.8 | 25.0 | 31.0 | 38.0 | 34.5 | ||||
| a Similar
to 1992 in precipitation and basin wetness. b Similar to 1993 in precipitation and basin wetness. c Includes traces of ring-necked ducks and wood ducks. |
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U.S. Department of the Interior |
U.S. Geological Survey
URL: http://www.npwrc.usgs.gov/resource/birds/waubay/tab6.htm
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Page Last Modified: Friday, 01-Feb-2013 20:04:11 EST
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