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Species · BCR 5 · BBS 2025 Release · 1966–2024

Clark's Nutcracker In Northern Pacific Rainforest

All regionsNorthern Pacific RainforestGeneralists

Clark's Nutcracker in Northern Pacific Rainforest has declined: down 46% on the route-weighted index since 1975.

-46%Since 1975TrendPercent 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 →
10Routes 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 →
41YearsYears 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 Clark's Nutcracker in Northern Pacific Rainforest. See the full index history below.

Clark's Nutcracker In Northern Pacific Rainforest Population Forecast

If the recent trend holds, Clark's Nutcracker in Northern Pacific Rainforest is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.18). A 5-year backtest shows a typical error of ±54.1%, with 100% of held-out values landing inside the 95% band.

n/aChange 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 →
0.00–0.1895% 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 →
±54.1%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, Clark's Nutcracker in Northern Pacific Rainforest is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.18). A 5-year backtest shows a typical error of ±54.1%, with 100% of held-out values landing inside the 95% band.19722029
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 →
20250.010.000.19
20260.010.000.19
20270.010.000.18
20280.010.000.18
20290.000.000.18

Routes In Northern Pacific Rainforest

Routes recording Clark's Nutcracker in Northern Pacific Rainforest.
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 →
HullvilleCALIFORNIA82006
Mt ShastaCALIFORNIA42019
Emigrant Lake 2OREGON42002
Elk LakeOREGON22024
Hurricane RgWASHINGTON22008
MccloudCALIFORNIA11981
GazelleCALIFORNIA12021
Cool CampOREGON12013
Whiskey Spg.OREGON12011
Mt RainierWASHINGTON11993

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