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Species · Colorado · BBS 2025 Release · 1966–2024

American Three-toed Woodpecker Population Trend in Colorado

All statesForest birds

American Three-toed Woodpecker in Colorado has held roughly steady: up 8% on the route-weighted index since 1972.

+8%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 →
38Routes 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 →
33YearsYears 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 21% by 2029 — from 0.15 in 2024 to a central estimate of 0.19 (95% range 0.01–0.36). A 5-year backtest shows a typical error of ±16%, with 100% of held-out values landing inside the 95% band.

+21%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 →
0.19Projected 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 →
0.01–0.3695% 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 →
±16%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 21% by 2029 — from 0.15 in 2024 to a central estimate of 0.19 (95% range 0.01–0.36). A 5-year backtest shows a typical error of ±16%, 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 →
20250.180.000.35
20260.180.010.35
20270.180.010.36
20280.180.010.36
20290.190.010.36

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
Radium320112011
Willow Peak220122006
Dolores Riv220182017
Gold Hill 2220182018
Dunckley Pas220212021
Owl Creek Pass220242003
Cochetopa Pass220152015
Moon Pass220142014
Lake City 2220242016
Cheesman Lk120061998
Parlin120112005
Pagosa Spgs119721968
Rio Grnds Rs120172010
Summitville120231992
Lost Lake120222000
Red Cliff120241989
Castleton120162016
Guffey120192019
Comanche Pk120221995
Baxter Pass120242024
Como120172017
Marshall Pas120012000
South Fork120242002
Stillwater Pass 2120162010

American Three-toed Woodpecker Population Trend in Other States

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