BirdAnalyst
Species · Indiana · BBS 2026 Release · 1966–2025

Wood Duck Population Trend in Indiana

All statesWaterfowl

Wood Duck in Indiana has surged: up 237% on the route-weighted index since 1968.

+237%Since 1968TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
65Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
59YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Wood Duck Trends in IndianaNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Wood Duck has surged in Indiana: up 237% on the route-weighted index since 1968.

Wood Duck Population Forecast in Indiana

If the recent trend holds, Wood Duck in Indiana is projected to stay roughly flat through 2030, near 0.85 (95% range 0.04–1.7). A 5-year backtest shows a typical error of ±23.3%, with 100% of held-out values landing inside the 95% band.

-7%Change by 2030TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
0.85Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.04–1.795% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±23.3%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Wood Duck in Indiana is projected to stay roughly flat through 2030, near 0.85 (95% range 0.04–1.7). A 5-year backtest shows a typical error of ±23.3%, with 100% of held-out values landing inside the 95% band.19662030
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20260.830.021.6
20270.840.031.6
20280.840.031.6
20290.840.041.7
20300.850.041.7

Wood Duck Survey Routes in Indiana

Routes recording Wood Duck in Indiana.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Witts Station2320252000
Columbia Cty1020241984
Decatur720162011
Muncie619931981
Swayzee520192000
Pimento520221983
Indian Spgs520251983
Plainfield519991999
Belmont420011986
Shelbyville420221985
New Castle420192019
Indiana Dune420251994
Galveston320191981
Tipton319911974
Berne320181979
Evansville320061979
Crown Point320162016
Montpelier320182018
Lakeville320161993
Anderson320212007
Knox220251984
Kewanna220171987
Middlebury220211993
Ellis220191966
W Lafayette220211983

Wood Duck Population Trend in Other States

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

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.