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Species · Oregon · BBS 2025 Release · 1966–2024

Red-breasted Nuthatch Population Trend in Oregon

All statesForest birds

Red-breasted Nuthatch in Oregon has edged down: down 23% on the route-weighted index since 1970.

-23%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 →
108Routes 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 →
56YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Red-breasted Nuthatch 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 Red-breasted Nuthatch in Oregon. See the full index history below.

Red-breasted Nuthatch Population Forecast in Oregon

If the recent trend holds, Red-breasted Nuthatch in Oregon is projected to rise about 66% by 2029 — from 4.5 in 2024 to a central estimate of 7.4 (95% range 3.7–11). A 5-year backtest shows a typical error of ±51.2%, with 80% of held-out values landing inside the 95% band.

+66%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 →
7.4Projected 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 →
3.7–1195% 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 →
±51.2%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, Red-breasted Nuthatch in Oregon is projected to rise about 66% by 2029 — from 4.5 in 2024 to a central estimate of 7.4 (95% range 3.7–11). A 5-year backtest shows a typical error of ±51.2%, with 80% 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 →
20257.23.611
20267.33.611
20277.33.611
20287.43.711
20297.43.711

Red-breasted Nuthatch Survey Routes in Oregon

Routes recording Red-breasted Nuthatch 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 →
Shellrock3720231968
Donnelly2920061994
Clearwater2820211991
Hash Rock2620241983
Myrtle Grove2620231992
Ochoco2419821972
Black Mtn.2420041993
Cinderella2320241993
Warner Mtn.2120241992
Desolation2020071993
Troy1920241992
Tualatin1720241973
Dell Spring1719991968
Hells Canyon1720221992
Barnhouse1720241998
Lakeview1720241996
Barnes Val1619871971
Elk Lake1620241972
Howard Mdws.1620241992
Paunina1520241993
Whiskey Spg.1420221992
Cool Camp1320131968
Hazel Camp1320221975
Summit Pr1320241984
Monument1320241993

Red-breasted Nuthatch Population Trend in Other States

alaskaarizonacaliforniacoloradoconnecticutidahoillinoisindianakansasmainemarylandmassachusettsmichiganminnesotamontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiopennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseeutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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