BirdAnalyst
Species · Wyoming · BBS 2025 Release · 1966–2024

Lazuli Bunting Population Trend in Wyoming

All statesGeneralists

Lazuli Bunting in Wyoming has declined: down 36% on the route-weighted index since 1970.

-36%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 →
64Routes 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 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 rise about 32% by 2029 — from 0.55 in 2024 to a central estimate of 0.73 (95% range 0.15–1.3). A 5-year backtest shows a typical error of ±32.1%, with 100% of held-out values landing inside the 95% band.

+32%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 →
0.73Projected 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 →
0.15–1.395% 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 →
±32.1%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 rise about 32% by 2029 — from 0.55 in 2024 to a central estimate of 0.73 (95% range 0.15–1.3). A 5-year backtest shows a typical error of ±32.1%, 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 →
20250.700.131.3
20260.710.141.3
20270.720.141.3
20280.720.151.3
20290.730.151.3

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 Mtn3320211981
Ethete720241991
Anchor620182016
Lysite620171991
Pine Tree519801980
Otto420241970
Dubois420241989
Savery419891989
Crowheart420161987
Ne Entrance320211990
Basin320241972
Alpine320241989
Fletcher Pk320241981
Yellowstone220161992
Seely 2220242004
Gvnt Valley220152001
Hunter Peak220171982
Clark220241990
Lovell220241992
Tensleep220241996
Dayton220241980
Bald Mtn220232008
Moskee219991980
Horse Creek220161980
Soda Lake220191980

Lazuli Bunting Population Trend in Other States

arizonacaliforniacoloradoidahokansasmontananebraskanevadanew-mexiconorth-dakotaoklahomaoregonsouth-dakotatexasutahwashington

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