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

Eastern Towhee Population Trend in Indiana

All statesGeneralists

Eastern Towhee in Indiana has risen sharply: up 66% on the route-weighted index since 1968.

+66%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 →
64Routes 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 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 66% 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 11% by 2029 — from 4.2 in 2024 to a central estimate of 4.7 (95% range 3.4–5.9). A 5-year backtest shows a typical error of ±5.8%, with 100% of held-out values landing inside the 95% band.

+11%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 →
4.7Projected 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 →
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 →
±5.8%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 11% by 2029 — from 4.2 in 2024 to a central estimate of 4.7 (95% range 3.4–5.9). A 5-year backtest shows a typical error of ±5.8%, 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 →
20254.53.35.8
20264.63.35.9
20274.63.35.9
20284.63.45.9
20294.73.45.9

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 →
Georgia2320241999
Indian Spgs1720241982
New Phila1520241982
Belmont1420241981
Spencer1320241967
Clear Spring1120241981
Celestine1020241979
Cross Plains1020241999
Cumback920211966
Millersburg920241981
Evansville920221966
Pimento820241981
Witts Station820242000
Brookville720241966
Scottsburg720241982
Wallace720242000
New Castle720242017
Knox620241981
Friendswood620241986
Azalia620241982
Vevay620241966
Corydon520241966
Hoosier520241990
Packertown420041968
Galveston420221981

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 2026-05-22.