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Species · Wyoming · BBS 2026 Release · 1966–2025

Warbling Vireo Population Trend in Wyoming

All statesForest birds

Warbling Vireo in Wyoming has risen sharply: up 65% on the route-weighted index since 1970.

+65%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 →
76Routes 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 Warbling Vireo 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 →

Warbling Vireo has risen sharply in Wyoming: up 65% on the route-weighted index since 1970.

Warbling Vireo Population Forecast in Wyoming

If the recent trend holds, Warbling Vireo in Wyoming is projected to rise about 21% by 2030 — from 5.0 in 2025 to a central estimate of 6.0 (95% range 3.6–8.5). A 5-year backtest shows a typical error of ±14.6%, with 100% of held-out values landing inside the 95% band.

+21%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 →
6.0Projected 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 →
3.6–8.595% 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 →
±14.6%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, Warbling Vireo in Wyoming is projected to rise about 21% by 2030 — from 5.0 in 2025 to a central estimate of 6.0 (95% range 3.6–8.5). A 5-year backtest shows a typical error of ±14.6%, 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 →
20265.83.38.3
20275.93.48.3
20285.93.58.4
20296.03.58.4
20306.03.68.5

Warbling Vireo Survey Routes in Wyoming

Routes recording Warbling Vireo 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 →
Moskee4420011980
Fiddler Lk4420251979
Mammoth4220251982
Alpine4020251979
Wilson3320251979
Moskee 23320212002
Colter Bay 23220252019
Sundance3120251975
Savery3119951989
Moskee 33120252022
Horse Creek2420251980
Hunter Peak2320251982
Colter Bay2119991968
Moose1820251976
Soda Lake1720251980
Buckskin Mtn1720251980
Big Sandy1520251992
Sybille Cyn1120242014
Dubois1020251968
Meeteetse1020251997
Ne Entrance920251982
Savery 2920252007
Buford820251976
Warbonnet820251990
Ryan Park820252011

Warbling Vireo Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawareidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsin

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