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

Wood Duck Population Trend in Indiana

All statesWaterfowl

Wood Duck in Indiana has surged: up 191% on the route-weighted index since 1968.

+191%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 →
58YearsYears 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 191% 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 rise about 28% by 2029 — from 0.66 in 2024 to a central estimate of 0.84 (95% range 0.02–1.7). A 5-year backtest shows a typical error of ±25.6%, with 100% of held-out values landing inside the 95% band.

+28%Change by 2029TrendPercent 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 →
0.84Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.02–1.795% 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 →
±25.6%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 rise about 28% by 2029 — from 0.66 in 2024 to a central estimate of 0.84 (95% range 0.02–1.7). A 5-year backtest shows a typical error of ±25.6%, with 100% of held-out values landing inside the 95% band.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 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 →
20250.820.011.6
20260.820.011.6
20270.830.011.6
20280.830.021.6
20290.840.021.7

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 →
Indiana Dune1620231994
Columbia Cty1020241984
Decatur720162011
Witts Station720242000
Muncie619931981
Jamestown620231986
Swayzee520192000
Pimento520221983
Brookville520241969
Plainfield519991999
Wabash420241996
Belmont420011986
Shelbyville420221985
New Castle420192019
Portage 2420242005
Galveston320191981
Tipton319911974
Berne320181979
Evansville320061979
Crown Point320162016
Montpelier320182018
Lakeville320161993
Anderson320212007
Kewanna220171987
Middlebury220211993

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 2026-05-22.