BirdAnalyst
Species · BCR 32 · BBS 2025 Release · 1966–2024

Hairy Woodpecker In Coastal California

All regionsCoastal CaliforniaForest birds

Hairy Woodpecker in Coastal California has edged up: up 18% on the route-weighted index since 1971.

+18%Since 1971TrendPercent 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 →
67Routes 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 →
55YearsYears 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 Hairy Woodpecker in Coastal California. See the full index history below.

Hairy Woodpecker In Coastal California Population Forecast

If the recent trend holds, Hairy Woodpecker in Coastal California is projected to rise about 61% by 2029 — from 0.55 in 2024 to a central estimate of 0.89 (95% range 0.54–1.2). A 5-year backtest shows a typical error of ±60.2%, with 20% of held-out values landing inside the 95% band.

+61%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 →
0.89Projected 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 →
0.54–1.295% 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 →
±60.2%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, Hairy Woodpecker in Coastal California is projected to rise about 61% by 2029 — from 0.55 in 2024 to a central estimate of 0.89 (95% range 0.54–1.2). A 5-year backtest shows a typical error of ±60.2%, with 20% of held-out values landing inside the 95% band.19692029
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 →
20250.850.501.2
20260.860.511.2
20270.870.521.2
20280.880.531.2
20290.890.541.2

Routes In Coastal California

Routes recording Hairy Woodpecker in Coastal California.
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 →
FairfaxCALIFORNIA162024
StonyfordCALIFORNIA62018
Point ReyesCALIFORNIA42023
Mt Pinos 2CALIFORNIA42021
Bartlett SpsCALIFORNIA42018
Cal Hot SpgsCALIFORNIA42019
Big BearCALIFORNIA31986
CohassetCALIFORNIA32023
Sawmill MtnCALIFORNIA32022
TujungaCALIFORNIA32015
Green ValleyCALIFORNIA32023
TehamaCALIFORNIA32021
CoyoteCALIFORNIA32024
Waterman GapCALIFORNIA32024
Lake Hemet 2CALIFORNIA32023
WoodlandsCALIFORNIA32022
San Benito Mtn.CALIFORNIA32009
Santa YnezCALIFORNIA22014
Mt PinosCALIFORNIA22004
Lake HemetCALIFORNIA21986
Carmel ValCALIFORNIA22024
Lockwood ValCALIFORNIA22016
Lake CachumaCALIFORNIA22013
CrestonCALIFORNIA21984
Glen EllenCALIFORNIA22003

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