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

Mallard Population Trend in Connecticut

All statesWaterfowl

Mallard in Connecticut has edged down: down 16% on the route-weighted index since 1968.

-16%Since 1968
19Routes In State
58Years

Notable Mallard Trends in Connecticut

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

Mallard Population Forecast in Connecticut

If the recent trend holds, Mallard in Connecticut is projected to rise about 178% by 2029 — from 0.56 in 2024 to a central estimate of 1.5 (95% range 0.00–4.4). A 5-year backtest shows a typical error of ±523.2%, with 100% of held-out values landing inside the 95% band.

+178%Change by 2029
1.5Projected 2029 index
0.00–4.495% range
±523.2%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
20251.60.004.5
20261.60.004.5
20271.60.004.5
20281.60.004.4
20291.50.004.4

Mallard Survey Routes in Connecticut

Routes recording Mallard in Connecticut.
Buckingham2220221966
New Hartford720211994
Sherman520181980
Danbury420221971
Southington420241973
No Woodbury320111967
E Hartland219921971
Woodstock219961970
Westbrook220191974
Woodstock 2220172017
Granby219961988
Mystic120231973
Uncasville120191989
Willimantic120171974
Greenwich120071968
Warren120111973
Long Hill120191972
Mid Haddam120241973
New Hartford119871973

Mallard Population Trend in Other States

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

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