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Species · Wyoming · BBS 2025 Release · 1966–2024

Green-tailed Towhee Population Trend in Wyoming

All statesGeneralists

Green-tailed Towhee in Wyoming has surged: up 84% on the route-weighted index since 1970.

+84%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 →
56YearsYears 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 84% 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 21% by 2029 — from 3.6 in 2024 to a central estimate of 4.3 (95% range 2.6–6.0). A 5-year backtest shows a typical error of ±33.3%, with 100% of held-out values landing inside the 95% band.

+21%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 →
4.3Projected 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 →
2.6–6.095% 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 →
±33.3%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 21% by 2029 — from 3.6 in 2024 to a central estimate of 4.3 (95% range 2.6–6.0). A 5-year backtest shows a typical error of ±33.3%, with 100% of held-out values landing inside the 95% band.19682029
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 →
20254.22.55.9
20264.22.55.9
20274.32.66.0
20284.32.66.0
20294.32.66.0

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 →
Sybille Cyn5520241989
Savery4219951989
Rock Springs3720221977
Anchor2120181993
Moose2020241976
Big Sandy2020231987
Rock Springs 21920242023
Colter Bay 21820242019
Savery 21720242007
Walcott1620241982
Cumberland1520241977
Boulder1320241984
Reliance1320181977
Moran1320162002
Meeteetse1220242000
Buford1120241976
Alpine1120241979
Ne Entrance1020211982
Mammoth1020241982
Dubois820241968
Baggs820241995
Colter Bay719991968
Hunter Peak720241982
Mtn View720241980
Wilson620241979

Green-tailed Towhee Population Trend in Other States

arizonacaliforniacoloradoidahomontananevadanew-mexicooregontexasutah

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