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Species · Indiana · BBS 2026 Release · 1966–2025

Yellow-throated Warbler Population Trend in Indiana

All statesForest birds

Yellow-throated Warbler in Indiana has surged: up 441% on the route-weighted index since 1969.

+441%Since 1969TrendPercent 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 →
48Routes 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 →
55YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Yellow-throated 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 →

Yellow-throated Warbler has surged in Indiana: up 441% on the route-weighted index since 1969.

Yellow-throated Warbler Population Forecast in Indiana

If the recent trend holds, Yellow-throated 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 0.50–1.2). A 5-year backtest shows a typical error of ±15%, 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 →
0.50–1.295% 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 →
±15%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, Yellow-throated 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 0.50–1.2). A 5-year backtest shows a typical error of ±15%, 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 →
20260.810.471.2
20270.820.471.2
20280.830.481.2
20290.840.491.2
20300.840.501.2

Yellow-throated Warbler Survey Routes in Indiana

Routes recording Yellow-throated 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 →
Hoosier520251990
Belmont420241984
Corydon420251966
Wallace420242000
Witts Station420252000
Georgia320252009
Monticello220241984
Galveston220221981
Maplewood220212021
Sexton220242019
Millersburg220241996
Celestine220241979
Clear Spring220251981
Vevay220251968
Evansville220141980
Hebron119901990
Knox119981998
Kewanna120172005
Columbia Cty119921992
Packertown119931993
Fowler119901990
Thorntown120211996
Middletown120221974
Swayzee120132013
Wabash120252004

Yellow-throated Warbler Population Trend in Other States

alabamaarkansascaliforniadelawarefloridageorgiaillinoisiowakansaskentuckylouisianamarylandmichiganmississippimissourinew-jerseynorth-carolinaohiooklahomaoregonpennsylvaniasouth-carolinatennesseetexasvirginiawest-virginiawisconsin

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