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Species · Oklahoma · BBS 2026 Release · 1966–2025

Eastern Bluebird Population Trend in Oklahoma

All statesForest birds

Eastern Bluebird in Oklahoma has declined: down 45% on the route-weighted index since 1969.

-45%Since 1969TrendPercent 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 →
69Routes 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 →
58YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Eastern Bluebird 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 →

No notable trend signals for Eastern Bluebird in Oklahoma. See the full index history below.

Eastern Bluebird Population Forecast in Oklahoma

If the recent trend holds, Eastern Bluebird in Oklahoma is projected to rise about 17% by 2030 — from 8.2 in 2025 to a central estimate of 9.6 (95% range 3.9–15). A 5-year backtest shows a typical error of ±323.1%, with 20% of held-out values landing inside the 95% band.

+17%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 →
9.6Projected 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 →
3.9–1595% 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 →
±323.1%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, Eastern Bluebird in Oklahoma is projected to rise about 17% by 2030 — from 8.2 in 2025 to a central estimate of 9.6 (95% range 3.9–15). A 5-year backtest shows a typical error of ±323.1%, with 20% of held-out values landing inside the 95% band.19672030
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 →
20269.53.815
20279.53.915
20289.53.915
20299.53.915
20309.63.915

Eastern Bluebird Survey Routes in Oklahoma

Routes recording Eastern Bluebird 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 →
Verden4120171967
Noble2520251967
Beggs2320231967
Wainwright2220131992
Canadian2120171967
Sandbluff2120251992
Skiatook2020191982
Blanco1720161967
Ft Sill West1719941994
Indianola1620251967
Heyburn1620251992
Elgin1520161994
Wichita Mtns1519941994
Mcalester1419911967
Welch1420251967
Pocola1420161992
Ardmore1320251967
Holdenville1320251967
Bartlesville1320251967
Matoy1320251992
Grimes1220251967
Wichita Mts West1120192004
Lookout1020251972
Goodwater1020191992
Tatums1020251992

Eastern Bluebird Population Trend in Other States

alabamaarizonaarkansascoloradoconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiopennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsinwyoming

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