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

Ruby-crowned Kinglet Population Trend in Oregon

All statesForest birds

Ruby-crowned Kinglet in Oregon 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 →
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 Ruby-crowned Kinglet 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 Ruby-crowned Kinglet in Oregon. See the full index history below.

Ruby-crowned Kinglet Population Forecast in Oregon

If the recent trend holds, Ruby-crowned Kinglet in Oregon is projected to stay roughly flat through 2030, near 0.93 (95% range 0.00–2.0). A 5-year backtest shows a typical error of ±40%, with 100% of held-out values landing inside the 95% band.

+7%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 →
0.93Projected 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 →
0.00–2.095% 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 →
±40%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, Ruby-crowned Kinglet in Oregon is projected to stay roughly flat through 2030, near 0.93 (95% range 0.00–2.0). A 5-year backtest shows a typical error of ±40%, with 100% 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 →
20260.950.002.0
20270.950.002.0
20280.940.002.0
20290.940.002.0
20300.930.002.0

Ruby-crowned Kinglet Survey Routes in Oregon

Routes recording Ruby-crowned Kinglet 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 →
Black Mtn.2820041993
Desolation1720251993
Ochoco1519821973
Granite1520251986
Howard Mdws.1020251992
Hash Rock920251983
Barnes Val819841972
Coquille719971995
Ordnance619751975
Troy620251992
Flora520231986
Mount Vernon520241987
Newbridge520241992
Cool Camp419951968
Donelly 2420252018
Eagle Creek420251993
Albee320251968
Zumwalt320051995
Dayton319891989
Fish Lake320141980
Hells Canyon320251992
Barnhouse320251999
Monument320252022
Donnelly320062005
Summit Pr220091980

Ruby-crowned Kinglet Population Trend in Other States

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