2010 Population Estimates2010 Population Estimates
Total Breeding Duck Population Estimates
In the traditional survey area, which includes strata 1-18, 20-50, and 75-77, the total duck population estimate (excluding scoters [Melanitta spp.], eiders [Somateria spp. and Polysticta stelleri], long-tailed ducks [Clangula hyemalis], mergansers [Mergus spp. and Lophodytes cucullatus], and wood ducks [Aix sponsa]) was 40.9 million birds. This estimate was similar to last year’s estimate of 42 million birds, and was 21% above the long-term average.
Mallard Population Estimates
Estimated mallard (Anas platyrhynchos) abundance was 8.4 ± 0.3 million birds, which was similar to the 2009 estimate of 8.5 ± 0.2 million birds and 12% above the long-term average.
Northern Pintail Population Estimates
Estimated abundance for northern pintails (A. acuta) was 3.5 ± 0.2 million, which was similar to the 2009 estimate, and 13% below the long-term average of 4 million.
Blue-winged Teal Population Estimates
Estimated abundance of blue-winged teal (A. discors) was 6.3 ± 0.4 million, which was 14% below the 2009 estimate and 36% above their long-term average of 4.7 million.
Green-winged Teal Population Estimates
Estimated abundance of green-winged teal (A. crecca) was 3.5 ± 0.2 million, which was similar to the 2009 estimate and 78% above their long-term average of 1.9 million.
American Wigeon Population Estimates
Estimated abundance of American wigeon (A. americana) was 2.4 million, which was similar to 2009 and the long-term average.
Gadwall Population Estimates
Estimated abundance of gadwall (A. strepera) was 3.0 ± 0.2 million, which was similar to the 2009 estimate and 67% above the long-term average.
Scaup Population Estimates
Estimated abundance of scaup (A. affinis and A. marila combined) was 4.2 ± 0.2 million, which was similar to that of 2009 and 16% below the long-term average of 5.1 ± 0.05 million.
Northern Shoveler Population Estimates
Estimated abundance of northern shovelers (A. clypeata) was 4.1 ± 0.2 million, which was similar to their 2009 estimate and was 76% above their long-term average of 2.3 million.
Redhead Population Estimates
Estimated abundance of redheads (Aythya americana) was 1.1 ± 0.1 million, which was similar to their 2009 estimate and 63% above their long-term average of 0.7 million.
Canvasback Population Estimates
Estimated abundance for canvasbacks (A. valisineria) was 0.6 ± 0.05 million, which was similar to the 2009 estimate and to the long-term average.
