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

Pygmy Nuthatch Population Trend in Oregon

All statesForest birds

Pygmy Nuthatch in Oregon has increased: up 33% on the route-weighted index since 1970.

+33%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 →
40Routes 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 Pygmy 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 Pygmy Nuthatch in Oregon. See the full index history below.

Pygmy Nuthatch Population Forecast in Oregon

If the recent trend holds, Pygmy Nuthatch in Oregon is projected to rise about 29% by 2029 — from 0.58 in 2024 to a central estimate of 0.75 (95% range 0.35–1.2). A 5-year backtest shows a typical error of ±31.9%, with 80% of held-out values landing inside the 95% band.

+29%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 →
0.75Projected 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 →
0.35–1.295% 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 →
±31.9%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, Pygmy Nuthatch in Oregon is projected to rise about 29% by 2029 — from 0.58 in 2024 to a central estimate of 0.75 (95% range 0.35–1.2). A 5-year backtest shows a typical error of ±31.9%, 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 →
20250.720.321.1
20260.720.321.1
20270.730.331.1
20280.740.341.1
20290.750.351.2

Pygmy Nuthatch Survey Routes in Oregon

Routes recording Pygmy 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 →
Silver Creek1820241991
Sisters1520241997
Donelly 2720222022
Bly 2620222007
Eagle Rock619781973
Modoc Point520181970
Elk Lake420222004
Badger Creek419981994
Silvies420231995
Paunina420132004
Modoc Point 2320242024
Albee320221968
Summit Pr320241981
Paisley320221973
Troy319951995
Picture Flat320211993
Donnelly320041995
Flora220051987
Deschutes220241975
Ochoco219811977
Wickiup219721969
Dell Spring219831972
Camp Sherman219921974
Mount Vernon220082008
Howard Mdws.220242024

Pygmy Nuthatch Population Trend in Other States

arizonacaliforniacoloradoidahomontananebraskanew-mexicosouth-dakotautahwashingtonwyoming

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