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

Lazuli Bunting Population Trend in Oregon

All statesGeneralists

Lazuli Bunting in Oregon has increased: up 43% on the route-weighted index since 1970.

+43%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 →
104Routes 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 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 11% by 2029 — from 4.5 in 2024 to a central estimate of 4.0 (95% range 2.3–5.7). A 5-year backtest shows a typical error of ±22.6%, with 100% of held-out values landing inside the 95% band.

-11%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 →
4.0Projected 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 →
2.3–5.795% 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 →
±22.6%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 11% by 2029 — from 4.5 in 2024 to a central estimate of 4.0 (95% range 2.3–5.7). A 5-year backtest shows a typical error of ±22.6%, 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 →
20254.02.35.7
20264.02.35.7
20274.02.35.7
20284.02.35.7
20294.02.35.7

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 →
Imnaha7320241968
Newbridge4320241992
Umpqua4120241968
Hazel Camp3620221975
Bridgeport3420221986
Hells Canyon2920221992
Trout Creek2620211996
Green2320241994
Elkton2120241972
Emigrant Lake 22120242002
Twickenham2020242010
Secret Val1920221975
Cinderella1720241994
Adrian1420211984
Monument1320241993
Eagle Creek1120221994
Logdell1020241971
Days Creek1020241971
Modoc Point1020181970
Malheur Res.920232023
Hash Rock820241983
Barnes Val719851974
Pendleton720241972
Emigrant Lk720011972
Summit Pr720241981

Lazuli Bunting Population Trend in Other States

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