2016 Population Estimates

Total Breeding Duck 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 48 .4 ± 0.8 [SE] million birds. This estimate was similar to the 2015 estimate of 49.5 ± 0.8 million, and is 38% higher than the long-term average (1955–2015).

American Wigeon Population Estimates

American Wigeon Population Estimates

Estimated abundances of American wigeon ( A. americana; 3.4 ± 0.2 million) were similar to last year’s estimate and were 31% above the long-term average of 2.6 ± 0.02 million.

Blue-winged Teal Population Estimates

Blue-winged Teal Population Estimates

Estimated blue-winged teal ( A. discors; 6.7 ± 0.3 million) abundance was 22% lower than the 2015 estimate of 8.5 ± 0.4 million, but 34% above the long-term average of 5.0 ± 0.04 million.

Canvasback Population Estimates

Canvasback Population Estimates

Abundance estimates for canvasbacks (A. valisineria; 0.7 ± 0.07 million) was similar to the 2015 estimate, 26% above the long-term average of 0.6 ± 0.01 million. .

Green-winged Teal Population Estimates

Green-winged Teal Population Estimates

The estimated abundance of green-winged teal (A. crecca ) was 4.3 ± 0.3 million, which was similar to the 2015 estimate of 4.1 ± 0.2 million, and 104% above the long-term average (2.1 ± 0.02 million). This year again marks the highest estimate in the time series for green-winged teal.

Gadwall Population Estimates

Gadwall Population Estimates

Estimated abundance of gadwall (A. strepera; 3.7 ± 0.2 million) was similar to the 2015 estimate and 90% above the long-term average (2.0 ± 0.02 million).

Mallard Population Estimates

Mallard Population Estimates

The estimated mallard (Anas platyrhynchos) abundance was 11.8 ± 0.4 million, which was similar to the 2015 estimate, and 51% above the long-term average of 7.8 ± 0.04 million.

Northern Pintail Population Estimates

Northern Pintail Population Estimates

The estimate for northern pintails (A. acuta; 2.6 ± 0.2 million) was similar to the 2015 estimate and 34% below the long-term average of 4.0 ± 0.04 million.

Northern Shoveler Population Estimates

Northern Shoveler Population Estimates

The northern shoveler (A. clypeata) estimate was 4.0 ± 0.2 million, similar to the 2015 estimate, but 56% above the long-term average of 2.5 ± 0.02 million .

Redhead Population Estimates

Redhead Population Estimates

The estimated abundance for redheads (Aythya americana; 1.3 ± 0.1 million) was similar to the 2015 estimate and was 82% above the long-term average of 0.7 ± 0.01 million.

Pages