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

Mallard Population Trend in Oregon

All statesWaterfowl

Mallard in Oregon has surged: up 86% on the route-weighted index since 1970.

+86%Since 1970
112Routes In State
56Years

Notable Mallard Trends in Oregon

long arc increasecomputed index

Mallard has surged in Oregon: up 86% on the route-weighted index since 1970.

Mallard Population Forecast in Oregon

If the recent trend holds, Mallard in Oregon is projected to rise about 15% by 2029 — from 2.5 in 2024 to a central estimate of 2.8 (95% range 0.00–8.6). A 5-year backtest shows a typical error of ±22.1%, with 100% of held-out values landing inside the 95% band.

+15%Change by 2029
2.8Projected 2029 index
0.00–8.695% range
±22.1%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
20252.90.008.6
20262.90.008.6
20272.90.008.6
20282.90.008.6
20292.80.008.6

Mallard Survey Routes in Oregon

Routes recording Mallard in Oregon.
Catlow Rim5520241994
Umatilla5320231988
Fish Lake5120241972
Bly3320011973
Glasgow3320241986
Joseph2520231971
Warner Vally1820241993
Malheur Nwr1719981986
Sparta1620011971
Barnes Val1519871971
Coquille1520241994
Sandy River1320041993
Princeton1019851972
Emigrant Lk1020011972
Nicolai Mtn.1020241994
Madras1020221998
Summit Pr820241981
Salado720111974
Svensen719911991
Clearwater720211993
Three Forks720172005
Scappoose720221995
Battle Mtn619991988
Lapham Res.620241991
Merrill620221993

Mallard Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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