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Species · Oregon · BBS 2026 Release · 1966–2025

Green-tailed Towhee Population Trend in Oregon

All statesForest birds

Green-tailed Towhee in Oregon has risen sharply: up 68% on the route-weighted index since 1970.

+68%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 →
52Routes 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 OregonNotable 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 →

Green-tailed Towhee has risen sharply in Oregon: up 68% on the route-weighted index since 1970.

Green-tailed Towhee Population Forecast in Oregon

If the recent trend holds, Green-tailed Towhee in Oregon is projected to rise about 32% by 2030 — from 1.6 in 2025 to a central estimate of 2.1 (95% range 1.4–2.8). A 5-year backtest shows a typical error of ±38.2%, with 80% of held-out values landing inside the 95% band.

+32%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 →
2.1Projected 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 →
1.4–2.895% 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 →
±38.2%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 Oregon is projected to rise about 32% by 2030 — from 1.6 in 2025 to a central estimate of 2.1 (95% range 1.4–2.8). A 5-year backtest shows a typical error of ±38.2%, with 80% 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 →
20262.01.32.8
20272.11.32.8
20282.11.32.8
20292.11.32.8
20302.11.42.8

Green-tailed Towhee Survey Routes in Oregon

Routes recording Green-tailed Towhee in Oregon.
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 →
Lakeview2020251996
Fish Lake1820251972
Barnes Val1719871984
Picture Flat1720251994
Buchanan1520251971
Paisley1520251973
Bly 21020252007
Chinchalo920251993
Bald Mtn.820251992
Donnelly820061995
Flook Lake820251994
Clover Creek620251974
Silver Creek620251984
Donelly 2620252019
Silvies620231994
Sisters620251997
Deschutes419991971
Wickiup419711969
Davis Lake420252000
Dell Spring319991968
Emigrant Lk319921974
Ochoco320211998
Unity320251992
Paunina320251993
Crooked Riv.319971997

Green-tailed Towhee Population Trend in Other States

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