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Species · Indiana · BBS 2026 Release · 1966–2025

Hooded Warbler Population Trend in Indiana

All statesForest birds

Hooded Warbler in Indiana has surged: up 520% on the route-weighted index since 1971.

+520%Since 1971TrendPercent 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 →
22Routes 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 →
53YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Hooded Warbler 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 →

Hooded Warbler has surged in Indiana: up 520% on the route-weighted index since 1971.

Hooded Warbler Population Forecast in Indiana

If the recent trend holds, Hooded Warbler in Indiana is projected to rise about 34% by 2030 — from 0.63 in 2025 to a central estimate of 0.84 (95% range 0.44–1.2). A 5-year backtest shows a typical error of ±8.6%, with 100% of held-out values landing inside the 95% band.

+34%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 →
0.84Projected 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 →
0.44–1.295% 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 →
±8.6%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, Hooded Warbler in Indiana is projected to rise about 34% by 2030 — from 0.63 in 2025 to a central estimate of 0.84 (95% range 0.44–1.2). A 5-year backtest shows a typical error of ±8.6%, with 100% of held-out values landing inside the 95% band.19672030
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 →
20260.790.391.2
20270.810.401.2
20280.820.421.2
20290.830.431.2
20300.840.441.2

Hooded Warbler Survey Routes in Indiana

Routes recording Hooded Warbler 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 →
Hoosier2420251990
Belmont1020241982
Corydon320251967
Clear Spring220091983
Georgia220241999
Indiana Dune120191997
Packertown120042004
Ellis119981998
Galveston120071998
Wabash120242009
Azalia119821982
Cumback119981968
Indian Spgs120251996
Celestine120241984
New Phila120221983
Vevay119761976
Wallace120232007
New Castle120232023
Cross Plains120252000
Cyprss120222022
Lakeville120242024
Packertown 2120052005

Hooded Warbler Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoiskentuckylouisianamarylandmassachusettsmichiganmississippimissourinew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniarhode-islandsouth-carolinatennesseetexasvirginiawest-virginiawisconsin

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