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

White-breasted Nuthatch Population Trend in Idaho

All statesForest birds

White-breasted Nuthatch in Idaho has collapsed: down 91% on the route-weighted index since 1976.

-91%Since 1976TrendPercent 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 →
15Routes 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 →
35YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable White-breasted Nuthatch Trends in IdahoNotable 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 →

White-breasted Nuthatch has collapsed in Idaho: down 91% on the route-weighted index since 1976.

White-breasted Nuthatch Population Forecast in Idaho

If the recent trend holds, White-breasted Nuthatch in Idaho is projected to fall about 100% by 2029 — from 0.08 in 2024 to a central estimate of 0.00 (95% range 0.00–0.49). A 5-year backtest shows a typical error of ±440.8%, with 100% of held-out values landing inside the 95% band.

-100%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 →
0.00Projected 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 →
0.00–0.4995% 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 →
±440.8%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, White-breasted Nuthatch in Idaho is projected to fall about 100% by 2029 — from 0.08 in 2024 to a central estimate of 0.00 (95% range 0.00–0.49). A 5-year backtest shows a typical error of ±440.8%, 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 →
20250.000.000.49
20260.000.000.49
20270.000.000.49
20280.000.000.49
20290.000.000.49

White-breasted Nuthatch Survey Routes in Idaho

Routes recording White-breasted Nuthatch in Idaho.
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 →
Alturas1019681968
Featherville320071989
Coolin320011995
N Fork Cda R219951995
Joel220241992
Yellow Pine220141989
Magic Mtn219901990
Naples119801980
Silver City120131998
Kyle Canyon119951995
Cascade119761974
Salmon River119881988
Burgdorf120161990
Centerville120041990
Springfield119771977

White-breasted Nuthatch Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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