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Species · Wyoming · BBS 2026 Release · 1966–2025

Green-tailed Towhee Population Trend in Wyoming

All statesForest birds

Green-tailed Towhee in Wyoming has surged: up 95% on the route-weighted index since 1970.

+95%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 →
89Routes 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 WyomingNotable 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 surged in Wyoming: up 95% on the route-weighted index since 1970.

Green-tailed Towhee Population Forecast in Wyoming

If the recent trend holds, Green-tailed Towhee in Wyoming is projected to rise about 13% by 2030 — from 3.9 in 2025 to a central estimate of 4.4 (95% range 2.7–6.0). A 5-year backtest shows a typical error of ±21.8%, with 100% of held-out values landing inside the 95% band.

+13%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 →
4.4Projected 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 →
2.7–6.095% 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 →
±21.8%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, Green-tailed Towhee in Wyoming is projected to rise about 13% by 2030 — from 3.9 in 2025 to a central estimate of 4.4 (95% range 2.7–6.0). A 5-year backtest shows a typical error of ±21.8%, 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 →
20264.22.55.9
20274.22.65.9
20284.32.66.0
20294.32.66.0
20304.42.76.0

Green-tailed Towhee Survey Routes in Wyoming

Routes recording Green-tailed Towhee in Wyoming.
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 →
Savery4219951989
Rock Springs3720221977
Sybille Cyn3720251989
Big Sandy2820251987
Rock Springs 22820252023
Savery 22520252007
Anchor2120181993
Boulder1820251984
Mammoth1620251982
Moose1620251976
Walcott1420251982
Leo1320251994
Moran1320162002
Nowood1220251993
Ne Entrance1020251982
Reliance1020251977
Baggs1020251995
Cumberland920251977
Hunter Peak920251982
Colter Bay 2920252019
Bear Creek820251974
Horse Creek820251980
Lamont820251987
Colter Bay719991968
Mtn View720241980

Green-tailed Towhee Population Trend in Other States

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