BirdAnalyst
Species · BCR 9 · BBS 2026 Release · 1966–2025

Red-breasted Nuthatch In Great Basin

All regionsGreat BasinForest birds

Red-breasted Nuthatch in Great Basin has edged up: up 14% on the route-weighted index since 1970.

+14%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 →
107Routes In RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
57YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable SignalsNotable 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 Great Basin. See the full index history below.

Red-breasted Nuthatch In Great Basin Population Forecast

If the recent trend holds, Red-breasted Nuthatch in Great Basin is projected to stay roughly flat through 2030, near 3.0 (95% range 1.9–4.0). A 5-year backtest shows a typical error of ±24.5%, with 100% of held-out values landing inside the 95% band.

+9%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 →
3.0Projected 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 →
1.9–4.095% 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 →
±24.5%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 Great Basin is projected to stay roughly flat through 2030, near 3.0 (95% range 1.9–4.0). A 5-year backtest shows a typical error of ±24.5%, with 100% of held-out values landing inside the 95% band.19682030
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 →
20262.91.83.9
20272.91.93.9
20282.91.94.0
20292.91.94.0
20303.01.94.0

Routes In Great Basin

Routes recording Red-breasted Nuthatch in Great Basin.
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 →
RimrockWASHINGTON462025
Blewett PassWASHINGTON442025
Medicine Mtn.CALIFORNIA352021
L. WenatcheeWASHINGTON292025
E. Mt. AdamsWASHINGTON292025
CarltonWASHINGTON242022
MazamaWASHINGTON242022
Davis LakeOREGON232025
Wizard FallsOREGON222025
RonaldWASHINGTON202025
Dell SpringOREGON171999
TionestaCALIFORNIA162021
Barnes ValOREGON161987
SnowdenWASHINGTON162025
LakeviewOREGON152025
BartleCALIFORNIA142021
Badger CreekOREGON142025
ChinchaloOREGON142025
LeavenworthWASHINGTON142024
Bald Mtn.OREGON132025
Lapham Res.OREGON102025
SistersOREGON102025
PauninaOREGON102025
Mt HoodOREGON92025
BlyOREGON82001

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