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Species · Oklahoma · BBS 2025 Release · 1966–2024

Scaled Quail Population Trend in Oklahoma

All statesGeneralists

Scaled Quail in Oklahoma has fallen sharply: down 58% on the route-weighted index since 1971.

-58%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 →
11Routes 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 →
52YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Scaled Quail Trends in OklahomaNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

long arc declinecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Scaled Quail has fallen sharply in Oklahoma: down 58% on the route-weighted index since 1971.

Scaled Quail Population Forecast in Oklahoma

If the recent trend holds, Scaled Quail in Oklahoma is projected to fall about 55% by 2029 — from 0.41 in 2024 to a central estimate of 0.19 (95% range 0.00–0.60). A 5-year backtest shows a typical error of ±50.4%, with 100% of held-out values landing inside the 95% band.

-55%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 →
0.19Projected 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 →
0.00–0.6095% 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 →
±50.4%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, Scaled Quail in Oklahoma is projected to fall about 55% by 2029 — from 0.41 in 2024 to a central estimate of 0.19 (95% range 0.00–0.60). A 5-year backtest shows a typical error of ±50.4%, 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 →
20250.210.000.62
20260.200.000.62
20270.200.000.61
20280.190.000.61
20290.190.000.60

Scaled Quail Survey Routes in Oklahoma

Routes recording Scaled Quail in Oklahoma.
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 →
Hardesty720241975
Beaver520181981
Randlett319931990
Felt220241968
Clear Lake120241996
Hooker120241992
Keyes120241992
Cookietown119841984
Reed120001974
Duncan119951995
Hollis119951995

Scaled Quail Population Trend in Other States

arizonacoloradokansasnew-mexicotexasutahwashington

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