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Species · Oregon · BBS 2026 Release · 1966–2025

Cassin's Finch Population Trend in Oregon

All statesForest birds

Cassin's Finch in Oregon has increased: up 40% on the route-weighted index since 1970.

+40%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 →
71Routes 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 Cassin's Finch 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 Cassin's Finch in Oregon. See the full index history below.

Cassin's Finch Population Forecast in Oregon

If the recent trend holds, Cassin's Finch in Oregon is projected to stay roughly flat through 2030, near 2.9 (95% range 0.41–5.5). A 5-year backtest shows a typical error of ±19.2%, with 100% of held-out values landing inside the 95% band.

-6%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 →
2.9Projected 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 →
0.41–5.595% 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 →
±19.2%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, Cassin's Finch in Oregon is projected to stay roughly flat through 2030, near 2.9 (95% range 0.41–5.5). A 5-year backtest shows a typical error of ±19.2%, 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 →
20262.90.395.5
20272.90.395.5
20282.90.405.5
20292.90.405.5
20302.90.415.5

Cassin's Finch Survey Routes in Oregon

Routes recording Cassin's Finch 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 →
Silvies3820241994
Silver Creek3620251984
Barnhouse3020251998
Donelly 22720252018
Monument2120251993
Wallowa1820252025
Donnelly1720061994
Ochoco1619821972
Paisley1620251973
Barnes Val1619871984
Mount Vernon1520241986
Zumwalt1420051995
Black Mtn.1420041993
Hash Rock1320251983
Deschutes1220221979
Unity1220251992
Bald Mtn.1220251992
Bly1120011973
Howard Mdws.1120251992
Hells Canyon1120251992
Newbridge1120251992
Eagle Creek1020251993
Lapham Res.920251992
Lakeview920251996
Troy820251992

Cassin's Finch Population Trend in Other States

arizonacaliforniacoloradoidahomontananevadanew-mexicosouth-dakotautahwashingtonwyoming

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