BirdAnalyst
Species · Washington · BBS 2025 Release · 1966–2024

Mallard Population Trend in Washington

All statesWaterfowl

Mallard in Washington has held roughly steady: down 4% on the route-weighted index since 1970.

-4%Since 1970
93Routes In State
56Years

Notable Mallard Trends in Washington

No notable trend signals for Mallard in Washington. See the full index history below.

Mallard Population Forecast in Washington

If the recent trend holds, Mallard in Washington is projected to rise about 58% by 2029 — from 1.8 in 2024 to a central estimate of 2.8 (95% range 0.30–5.4). A 5-year backtest shows a typical error of ±91.7%, with 100% of held-out values landing inside the 95% band.

+58%Change by 2029
2.8Projected 2029 index
0.30–5.495% range
±91.7%Backtest error
19682029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20252.80.295.4
20262.80.295.4
20272.80.295.4
20282.80.295.4
20292.80.305.4

Mallard Survey Routes in Washington

Routes recording Mallard in Washington.
Bay View13620171993
Yakima3120241993
Reardan2320221968
Mukilteo1920241993
Moses Coulee1620231995
Rainier1620132005
Horn Rapids1420212008
Brewster1320181977
Port Angeles820241971
Camas820091977
Kendall820161995
Tonasket820181982
Harwood819971993
Winthrop620211983
Odessa620241993
Columbia Nwr620211992
Asotin520221988
Ronald520241975
Mesa520081994
Hanford Site519961988
Connell419981970
Ewan 2420242023
Deception420171992
Turnbull Nwr420231993
Ewan320191983

Mallard Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawest-virginiawisconsinwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.