BirdAnalyst
Species · Rhode Island · BBS 2025 Release · 1966–2024

Mallard Population Trend in Rhode Island

All statesWaterfowl

Mallard in Rhode Island has risen sharply: up 70% on the route-weighted index since 1971.

+70%Since 1971
6Routes In State
39Years

Notable Mallard Trends in Rhode Island

long arc increasecomputed index

Mallard has risen sharply in Rhode Island: up 70% on the route-weighted index since 1971.

Mallard Population Forecast in Rhode Island

If the recent trend holds, Mallard in Rhode Island is projected to rise about 25× by 2029 — from 0.33 in 2024 to a central estimate of 8.3 (95% range 0.00–18). A 5-year backtest shows a typical error of ±1755%, with 20% of held-out values landing inside the 95% band.

25×Change by 2029
8.3Projected 2029 index
0.00–1895% range
±1755%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
20257.90.0018
20268.00.0018
20278.10.0018
20288.20.0018
20298.30.0018

Mallard Survey Routes in Rhode Island

Routes recording Mallard in Rhode Island.
Casimir Pulaski Sf4120182016
Block Island820101989
Sachuest Pt419901967
Shannock220221973
Wallum Lake220221990
Quonset Pt120241982

Mallard Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniasouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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