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

Mallard Population Trend in Maine

All statesWaterfowl

Mallard in Maine has surged: up 14× on the route-weighted index since 1972.

14×Since 1972
52Routes In State
51Years

Notable Mallard Trends in Maine

long arc increasecomputed index

Mallard has surged in Maine: up 14× on the route-weighted index since 1972.

Mallard Population Forecast in Maine

If the recent trend holds, Mallard in Maine is projected to rise about 28% by 2029 — from 1.4 in 2024 to a central estimate of 1.8 (95% range 0.65–2.9). A 5-year backtest shows a typical error of ±68.4%, with 20% of held-out values landing inside the 95% band.

+28%Change by 2029
1.8Projected 2029 index
0.65–2.995% range
±68.4%Backtest error
19672029
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
20251.60.522.7
20261.70.552.8
20271.70.582.8
20281.70.622.8
20291.80.652.9

Mallard Survey Routes in Maine

Routes recording Mallard in Maine.
Manchester4219951977
Greenwood820241974
Turner620101990
Cape Neddick520221978
Boundary520151995
Kittery Pt420241973
Hartford420241992
Harmony420241988
Hermon420192006
Warren319851985
Brooks320131996
Hancock320241978
Newcastle220081989
Reeds220221998
South Arm220121984
Aurora220172009
Deblois219801980
Charleston220161995
Greenville220221998
Cambridge220081998
Forest Sta219671967
Lake Moxie220222009
Horse Mtn220012001
Westbrook120081990
Biddeford120181987

Mallard Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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