BirdAnalyst
Species · New Hampshire · BBS 2025 Release · 1966–2024

Eastern Towhee Population Trend in New Hampshire

All statesGeneralists

Eastern Towhee in New Hampshire has collapsed: down 97% on the route-weighted index since 1968.

-97%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 →
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 →
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 New HampshireNotable 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 New Hampshire: down 97% on the route-weighted index since 1968.

Eastern Towhee Population Forecast in New Hampshire

If the recent trend holds, Eastern Towhee in New Hampshire is projected to fall about 100% by 2029 — from 0.55 in 2024 to a central estimate of 0.00 (95% range 0.00–7.4). A 5-year backtest shows a typical error of ±1582.4%, with 100% of held-out values landing inside the 95% band.

-100%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 →
0.00Projected 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 →
0.00–7.495% 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 →
±1582.4%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 New Hampshire is projected to fall about 100% by 2029 — from 0.55 in 2024 to a central estimate of 0.00 (95% range 0.00–7.4). A 5-year backtest shows a typical error of ±1582.4%, 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 →
20250.000.007.4
20260.000.007.4
20270.000.007.4
20280.000.007.4
20290.000.007.4

Eastern Towhee Survey Routes in New Hampshire

Routes recording Eastern Towhee in New Hampshire.
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 →
Brentwood519981966
Hopkinton320241966
Glen320241975
Concord220241966
Lempster220191966
Crawford Not219751969
Peterborough120141966
Fitzwilliam120241966
Dover120231966
Epsom120231966
Strafford120241966
Canterbury120181966
Gilmantn I W120181969
Wilmot120181966
Mt Chocorua120181966
Walpole120241966
Marlow120231966
Jefferson Hl120241966
Franconia119921966
Milan120231974
Stratford119741969
East Kingston120231999

Eastern Towhee Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsinwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.