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Species · Montana · BBS 2026 Release · 1966–2025

Green-tailed Towhee Population Trend in Montana

All statesForest birds

Green-tailed Towhee in Montana has edged down: down 16% on the route-weighted index since 1970.

-16%Since 1970TrendPercent 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 →
57YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Green-tailed Towhee Trends in MontanaNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for Green-tailed Towhee in Montana. See the full index history below.

Green-tailed Towhee Population Forecast in Montana

If the recent trend holds, Green-tailed Towhee in Montana is projected to fall about 25% by 2030 — from 0.59 in 2025 to a central estimate of 0.44 (95% range 0.15–0.73). A 5-year backtest shows a typical error of ±32.1%, with 100% of held-out values landing inside the 95% band.

-25%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 →
0.44Projected 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 →
0.15–0.7395% 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 →
±32.1%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, Green-tailed Towhee in Montana is projected to fall about 25% by 2030 — from 0.59 in 2025 to a central estimate of 0.44 (95% range 0.15–0.73). A 5-year backtest shows a typical error of ±32.1%, with 100% of held-out values landing inside the 95% band.19682030
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 →
20260.430.130.72
20270.430.140.72
20280.430.140.73
20290.440.140.73
20300.440.150.73

Green-tailed Towhee Survey Routes in Montana

Routes recording Green-tailed Towhee in Montana.
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 →
Pryor Mtn.1620251995
Hebgen Lake1020252017
Lima820251994
Beaverhead620251991
Clyde Park320252018
Bull Mtn.220142013
Red Rock220231980
Clancy220182015
Brunzell Slough220252021
Glen120062006
Willow Creek 2120252012
Leroy120251980
Boulder120251969
Two Dot120252015
Shawmut119941994
Chestnut120231968
Reed Point120221977
Laurel120051985
St Xavier120092006
Fort Logan120222018
Powderville119911991
Wise River120182018

Green-tailed Towhee Population Trend in Other States

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