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Species · Wyoming · BBS 2025 Release · 1966–2024

Plumbeous Vireo Population Trend in Wyoming

All statesForest birds

Plumbeous Vireo in Wyoming has declined: down 35% on the route-weighted index since 1977.

-35%Since 1977TrendPercent 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 →
30Routes 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 →
47YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Plumbeous 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 →

No notable trend signals for Plumbeous Vireo in Wyoming. See the full index history below.

Plumbeous Vireo Population Forecast in Wyoming

If the recent trend holds, Plumbeous Vireo in Wyoming is projected to rise about 147% by 2029 — from 0.08 in 2024 to a central estimate of 0.20 (95% range 0.00–0.42). A 5-year backtest shows a typical error of ±195%, with 100% of held-out values landing inside the 95% band.

+147%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 →
0.20Projected 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 →
0.00–0.4295% 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 →
±195%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, Plumbeous Vireo in Wyoming is projected to rise about 147% by 2029 — from 0.08 in 2024 to a central estimate of 0.20 (95% range 0.00–0.42). A 5-year backtest shows a typical error of ±195%, with 100% of held-out values landing inside the 95% band.19752029
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 →
20250.190.000.42
20260.190.000.42
20270.190.000.42
20280.190.000.42
20290.200.000.42

Plumbeous Vireo Survey Routes in Wyoming

Routes recording Plumbeous 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 →
Fox Park920011993
Moskee 3520242022
Moose419911991
Savery319951992
Ne Entrance219931992
Hunter Peak220041986
Moskee220011980
Moskee 2220212002
Cody120002000
Sundance120221975
Colter Bay119951995
Dubois120161987
Bill119991999
Brookhurst120191978
Seely 2120102006
Cumberland119881978
Gvnt Valley120221997
Buford120192019
Mammoth119891989
Crazy Woman120241987
Seely120001991
Alpine120011990
Big Sandy119891989
Fiddler Lk120152015
Sand Draw120152015

Plumbeous Vireo Population Trend in Other States

arizonacaliforniacoloradoidahomontananebraskanevadanew-mexicosouth-dakotatexasutah

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