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Species · Wyoming · BBS 2026 Release · 1966–2025

Lazuli Bunting Population Trend in Wyoming

All statesForest birds

Lazuli Bunting in Wyoming has edged up: up 20% on the route-weighted index since 1970.

+20%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 →
66Routes 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 Lazuli Bunting 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 Lazuli Bunting in Wyoming. See the full index history below.

Lazuli Bunting Population Forecast in Wyoming

If the recent trend holds, Lazuli Bunting in Wyoming is projected to fall about 46% by 2030 — from 1.5 in 2025 to a central estimate of 0.82 (95% range 0.21–1.4). A 5-year backtest shows a typical error of ±38.5%, with 80% of held-out values landing inside the 95% band.

-46%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 →
0.82Projected 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 →
0.21–1.495% 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 →
±38.5%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, Lazuli Bunting in Wyoming is projected to fall about 46% by 2030 — from 1.5 in 2025 to a central estimate of 0.82 (95% range 0.21–1.4). A 5-year backtest shows a typical error of ±38.5%, with 80% 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 →
20260.790.191.4
20270.800.191.4
20280.800.201.4
20290.810.211.4
20300.820.211.4

Lazuli Bunting Survey Routes in Wyoming

Routes recording Lazuli Bunting 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 →
Buckskin Mtn4120251981
Colter Bay 21020252021
Alpine920251989
Wilson820251982
Otto620251970
Hunter Peak620251982
Ethete620251991
Anchor620182016
Lysite620171991
Fiddler Lk620251987
Tensleep520251996
Pine Tree519801980
Warbonnet520252002
Savery419891989
Crowheart420161987
Fletcher Pk420251981
Sybille Cyn420251997
Basin320251972
Sundance320251975
Midvale320251987
Mammoth320251987
Lovell320251992
Ne Entrance220241990
Yellowstone220161992
Nowood220251996

Lazuli Bunting Population Trend in Other States

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