2009 Population Estimates

In the traditional survey area, which includes strata 1-18, 20-50, and 75-77, the total duck population estimate (excluding scoters, eiders, long-tailed ducks, mergansers, and wood ducks) was 42.0 million birds. This estimate represents a 13% increase over last year’s estimate of 37.3 million birds, and is 25% above the long-term average.

Canvasback Population Estimates

Canvasback Population Estimates

Estimated abundance for canvasbacks (A. valisineria) was 0.7 ± 0.06 million, which was 35% above the 2008 estimate (0.5 ± 0.05 million) and 16% above the long-term average.

Redhead Population Estimates

Redhead Population Estimates

Estimated abundance of redheads (Aythya americana) was 1.0 ± 0.1 million, which was similar to the 2008 estimate and 62% above the long-term average.

Northern Shoveler Population Estimates

Northern Shoveler Population Estimates

Estimated abundance of northern shovelers (A. clypeata) was 4.4 ± 0.2 million, which was 25% above the 2008 estimate and 92% above the long-term average.

Scaup Population Estimates

Scaup Population Estimates

Estimated abundance of scaup (A. affinis and A. marila combined) was 4.2 ± 0.2 million, which was 12% over the 2008 estimate and 18% below the long-term average of 5.1 ± 0.05 million.

Gadwall Population Estimates

Gadwall Population Estimates

Estimated abundance of gadwall (A. strepera) was 3.1 ± 0.2 million, which was 12% above the 2008 estimate and 73% above the long-term average.

American Wigeon Population Estimates

American Wigeon Population Estimates

Estimated abundance of American wigeon (A. americana) was 2.5 million, which was 1% below the 2008 estimate and 5% below the long-term average.

Green-winged Teal Population Estimates

Green-winged Teal Population Estimates

Estimated abundance of green-winged teal (A. crecca) was 3.4 ± 0.2 million, which was similar to last year's estimate and 79% above the long-term average.

Blue-winged Teal Population Estimates

Blue-winged Teal Population Estimates

Estimated abundance of blue-winged teal (A. discors) was 7.4 ± 0.4 million, which was similar to last year's estimate and 60% above the long-term average.

Northern Pintail Population Estimates

Northern Pintail Population Estimates

Estimated abundance for northern pintails (A. acuta) was 3.2 ± 0.2 million, which was 23% above the 2008 estimate of 2.6 ± 0.1 million, and 20% below the long-term average.

Mallard Population Estimates

Mallard Population Estimates

Estimated mallard (Anas platyrhynchos) abundance was 8.5 ± 0.2 million birds, which was a 10% increase over last year's estimate of 7.7 ± 0.3 million birds and 13% above the long-term average.

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