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Species · Connecticut · BBS 2026 Release · 1966–2025

Eastern Towhee Population Trend in Connecticut

All statesForest birds

Eastern Towhee in Connecticut has collapsed: down 87% on the route-weighted index since 1968.

-87%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 →
20Routes 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 ConnecticutNotable 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 declinecomputed 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 collapsed in Connecticut: down 87% on the route-weighted index since 1968.

Eastern Towhee Population Forecast in Connecticut

If the recent trend holds, Eastern Towhee in Connecticut is projected to fall about 100% by 2030 — from 4.3 in 2025 to a central estimate of 0.00 (95% range 0.00–8.2). A 5-year backtest shows a typical error of ±172.7%, with 100% of held-out values landing inside the 95% band.

-100%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 →
0.00Projected 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 →
0.00–8.295% 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 →
±172.7%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 Connecticut is projected to fall about 100% by 2030 — from 4.3 in 2025 to a central estimate of 0.00 (95% range 0.00–8.2). A 5-year backtest shows a typical error of ±172.7%, 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 →
20260.000.008.2
20270.000.008.2
20280.000.008.2
20290.000.008.2
20300.000.008.2

Eastern Towhee Survey Routes in Connecticut

Routes recording Eastern Towhee in Connecticut.
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 →
Warren1720111972
Woodstock 2920252016
Uncasville720251973
Woodstock720071968
New Hartford619871972
Warren 2620252012
No Woodbury520251967
Sherman420191972
Granby420251988
E Hartland219921966
Buckingham220221966
Westbrook220251969
Willimantic220181967
Danbury220231968
New Hartford220241994
Mystic120231973
Greenwich120071967
Long Hill120191972
Mid Haddam120251973
Southington120111973

Eastern Towhee Population Trend in Other States

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

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