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

Mallard Population Trend in Delaware

All statesWaterfowl

Mallard in Delaware has edged up: up 20% on the route-weighted index since 1969.

+20%Since 1969
15Routes In State
57Years

Notable Mallard Trends in Delaware

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

Mallard Population Forecast in Delaware

If the recent trend holds, Mallard in Delaware is projected to rise about 374% by 2029 — from 1.2 in 2024 to a central estimate of 5.7 (95% range 0.00–12). A 5-year backtest shows a typical error of ±383.4%, with 100% of held-out values landing inside the 95% band.

+374%Change by 2029
5.7Projected 2029 index
0.00–1295% range
±383.4%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
20255.40.0012
20265.50.0012
20275.60.0012
20285.60.0012
20295.70.0012

Mallard Survey Routes in Delaware

Routes recording Mallard in Delaware.
Wilmington2320141979
Bethany Bch1519901969
Mt Pleasant1020191969
Dover519871966
Holleyville 2520192006
Harrington320241973
Frederica320101966
Georgetown320181994
Pepperbox 2320242018
Frankford220081992
Holleyville220041969
Lowes Xrds219911986
Blackbird220231995
Milton120071975
Pepperbox120051999

Mallard Population Trend in Other States

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

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