BirdAnalyst
Species · Colorado · BBS 2026 Release · 1966–2025

American Three-toed Woodpecker Population Trend in Colorado

All statesForest birds

American Three-toed Woodpecker in Colorado has held roughly steady: down 10% on the route-weighted index since 1972.

-10%Since 1972TrendPercent 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 →
39Routes 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 →
34YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable American Three-toed Woodpecker Trends in ColoradoNotable 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 American Three-toed Woodpecker in Colorado. See the full index history below.

American Three-toed Woodpecker Population Forecast in Colorado

If the recent trend holds, American Three-toed Woodpecker in Colorado is projected to rise about 65% by 2030 — from 0.11 in 2025 to a central estimate of 0.18 (95% range 0.01–0.36). A 5-year backtest shows a typical error of ±23.6%, with 100% of held-out values landing inside the 95% band.

+65%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 →
0.18Projected 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 →
0.01–0.3695% 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 →
±23.6%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, American Three-toed Woodpecker in Colorado is projected to rise about 65% by 2030 — from 0.11 in 2025 to a central estimate of 0.18 (95% range 0.01–0.36). A 5-year backtest shows a typical error of ±23.6%, 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 →
20260.170.000.35
20270.180.000.35
20280.180.010.35
20290.180.010.35
20300.180.010.36

American Three-toed Woodpecker Survey Routes in Colorado

Routes recording American Three-toed Woodpecker in Colorado.
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 →
Mount Evans620242000
Red Cliff320251989
Groundhog Rs320252001
Radium320112011
Willow Peak220122006
Dolores Riv220182017
Gold Hill 2220182018
Dunckley Pas220212021
Deadman Rd.220251993
Owl Creek Pass220242003
Cochetopa Pass220152015
Moon Pass220142014
Lake City 2220242016
Cheesman Lk120061998
Parlin120112005
Pagosa Spgs119721968
Rio Grnds Rs120172010
Summitville120231992
Lost Lake120222000
Castleton120162016
Steamboat L.120252025
Guffey120192019
Comanche Pk120221995
Baxter Pass120242024
Como120172017

American Three-toed Woodpecker Population Trend in Other States

alaskaarizonaidahomaineminnesotamontananew-mexiconew-yorkoregonsouth-dakotautahwashingtonwyoming

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