BirdAnalyst
Species · New Hampshire · BBS 2025 Release · 1966–2024

Mallard Population Trend in New Hampshire

All statesWaterfowl

Mallard in New Hampshire has surged: up 203% on the route-weighted index since 1968.

+203%Since 1968
26Routes In State
56Years

Notable Mallard Trends in New Hampshire

long arc increasecomputed index

Mallard has surged in New Hampshire: up 203% on the route-weighted index since 1968.

Mallard Population Forecast in New Hampshire

If the recent trend holds, Mallard in New Hampshire is projected to stay roughly flat through 2029, near 1.9 (95% range 0.83–3.1). A 5-year backtest shows a typical error of ±17.3%, with 100% of held-out values landing inside the 95% band.

-1%Change by 2029
1.9Projected 2029 index
0.83–3.195% range
±17.3%Backtest error
19662029
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
20251.80.733.0
20261.90.753.0
20271.90.783.0
20281.90.803.0
20291.90.833.1

Mallard Survey Routes in New Hampshire

Routes recording Mallard in New Hampshire.
Epsom2320231980
Strafford1820241980
Franconia1120241986
Dover820241980
Peterborough519991984
Crawford Not519741967
Marlow420131990
Concord320151966
Wilmot320131991
Brentwood219971997
Fitzwilliam220241970
Canterbury220241978
Mt Chocorua219961973
Jefferson Hl220191992
Dixville Notch 2220182018
Hopkinton120091980
Gilmantn I W120171990
Walpole120231994
Lempster120231975
Milan120241978
Stratford120241978
Dixvil Notch120091988
Clarksville120231977
Glen120221991
East Kingston120231999

Mallard Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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