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Species · Wyoming · BBS 2025 Release · 1966–2024

Warbling Vireo Population Trend in Wyoming

All statesForest birds

Warbling Vireo in Wyoming has risen sharply: up 53% on the route-weighted index since 1970.

+53%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 →
75Routes 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 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 53% 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 12% by 2029 — from 5.4 in 2024 to a central estimate of 6.0 (95% range 3.5–8.5). A 5-year backtest shows a typical error of ±12%, with 100% of held-out values landing inside the 95% band.

+12%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 →
6.0Projected 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 →
3.5–8.595% 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 →
±12%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 12% by 2029 — from 5.4 in 2024 to a central estimate of 6.0 (95% range 3.5–8.5). A 5-year backtest shows a typical error of ±12%, 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 →
20255.83.38.3
20265.93.48.3
20275.93.48.4
20286.03.58.4
20296.03.58.5

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
Alpine4320241979
Hunter Peak4220241982
Colter Bay 23620242019
Mammoth3420241982
Soda Lake3320241980
Moskee 23320212002
Moskee 33220242022
Savery3119951989
Wilson3120241979
Fiddler Lk3120241979
Moose2620241976
Sundance2220241975
Colter Bay2119991968
Warbonnet2120241990
Big Sandy1820241992
Savery 21820242007
Buckskin Mtn1620211980
Ne Entrance1120211982
Horse Creek1120241980
Sybille Cyn1120242014
Fletcher Pk920241979
Prior Flats820241991
Ryan Park820232011
Dubois720241968

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 2026-05-22.