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Species · Indiana · BBS 2026 Release · 1966–2025

Eastern Towhee Population Trend in Indiana

All statesForest birds

Eastern Towhee in Indiana has risen sharply: up 57% on the route-weighted index since 1968.

+57%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 Eastern Towhee 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 →

Eastern Towhee has risen sharply in Indiana: up 57% on the route-weighted index since 1968.

Eastern Towhee Population Forecast in Indiana

If the recent trend holds, Eastern Towhee in Indiana is projected to rise about 20% by 2030 — from 3.9 in 2025 to a central estimate of 4.7 (95% range 3.4–5.9). A 5-year backtest shows a typical error of ±7.6%, with 100% of held-out values landing inside the 95% band.

+20%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 →
4.7Projected 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 →
3.4–5.995% 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 →
±7.6%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, Eastern Towhee in Indiana is projected to rise about 20% by 2030 — from 3.9 in 2025 to a central estimate of 4.7 (95% range 3.4–5.9). A 5-year backtest shows a typical error of ±7.6%, 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 →
20264.53.35.8
20274.63.35.8
20284.63.35.9
20294.63.35.9
20304.73.45.9

Eastern Towhee Survey Routes in Indiana

Routes recording Eastern Towhee 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 →
New Phila2420251982
Georgia1820251999
Indian Spgs1520251982
Belmont1420241981
Spencer1320241967
Azalia1320251982
Scottsburg1120251982
Clear Spring1020251981
Millersburg920241981
Celestine920251979
Evansville920221966
Indiana Dune920251993
Cross Plains920251999
Pimento720251981
Wallace720242000
New Castle720242017
Friendswood620241986
Corydon520251966
Knox420251981
Packertown420041968
Brookville420251966
Cumback420251966
Laporte420222000
Newberry420251999
Kankakee Sands420252000

Eastern Towhee Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsinwyoming

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