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

Mountain Quail Population Trend in Oregon

All statesGeneralists

Mountain Quail in Oregon has increased: up 25% on the route-weighted index since 1971.

+25%Since 1971TrendPercent 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 →
51Routes 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 →
55YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Mountain Quail 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 Mountain Quail in Oregon. See the full index history below.

Mountain Quail Population Forecast in Oregon

If the recent trend holds, Mountain Quail in Oregon is projected to stay roughly flat through 2029, near 0.40 (95% range 0.06–0.74). A 5-year backtest shows a typical error of ±34.3%, with 100% of held-out values landing inside the 95% band.

-5%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 →
0.40Projected 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 →
0.06–0.7495% 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 →
±34.3%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, Mountain Quail in Oregon is projected to stay roughly flat through 2029, near 0.40 (95% range 0.06–0.74). A 5-year backtest shows a typical error of ±34.3%, 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 →
20250.410.070.74
20260.410.070.74
20270.410.070.74
20280.400.070.74
20290.400.060.74

Mountain Quail Survey Routes in Oregon

Routes recording Mountain Quail 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 →
Hazel Camp1420221977
Prospect1020241993
Twickenham920162011
Mt Hood720221990
Secret Val720221975
Hash Rock520242021
Paunina520112006
Days Creek420241970
Badger Creek420242000
Selma420231993
Shellrock320192007
Harlan 2320242016
Emigrant Lake 2320232006
Emigrant Lk319911972
Ochoco320152015
Cinderella320241993
Sams Valley320241993
Molalla219951994
Albee220132013
Scappoose220092009
Wizard Falls220162010
Elkton220241973
Clearwater220121991
Waldport220011993
Blue River220061997

Mountain Quail Population Trend in Other States

californianevadawashington

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