BirdAnalyst
Species · Oregon · BBS 2026 Release · 1966–2025

Lazuli Bunting Population Trend in Oregon

All statesForest birds

Lazuli Bunting in Oregon has increased: up 47% on the route-weighted index since 1970.

+47%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 →
106Routes 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 OregonNotable 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 Oregon. See the full index history below.

Lazuli Bunting Population Forecast in Oregon

If the recent trend holds, Lazuli Bunting in Oregon is projected to fall about 25% by 2030 — from 5.5 in 2025 to a central estimate of 4.1 (95% range 2.4–5.8). A 5-year backtest shows a typical error of ±21%, with 80% of held-out values landing inside the 95% band.

-25%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 →
4.1Projected 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 →
2.4–5.895% 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 →
±21%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 Oregon is projected to fall about 25% by 2030 — from 5.5 in 2025 to a central estimate of 4.1 (95% range 2.4–5.8). A 5-year backtest shows a typical error of ±21%, 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 →
20264.12.45.8
20274.12.45.8
20284.12.45.8
20294.12.45.8
20304.12.45.8

Lazuli Bunting Survey Routes in Oregon

Routes recording Lazuli Bunting in Oregon.
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 →
Hells Canyon6720251992
Imnaha4620251968
Newbridge4120251992
Hazel Camp3620221975
Umpqua3020251968
Bridgeport2520251986
Cinderella1920251994
Lakeview1720251996
Elkton1620251972
Twickenham1620252010
Sparta1520251971
Adrian1520251984
Logdell1420251971
Summit Pr1420251981
Ochoco1420251993
Green1420251994
Secret Val1320251975
Wallowa1320252025
Monument1220251993
Donelly 21220252024
Molalla1120252018
Modoc Point1020181970
Prospect1020251994
Emigrant Lake 2920252002
Ruch920251993

Lazuli Bunting Population Trend in Other States

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