BirdAnalyst
Species · Colorado · BBS 2025 Release · 1966–2024

Downy Woodpecker Population Trend in Colorado

All statesForest birds

Downy Woodpecker in Colorado has declined: down 47% on the route-weighted index since 1974.

-47%Since 1974TrendPercent 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 →
79Routes 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 →
47YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Downy 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 Downy Woodpecker in Colorado. See the full index history below.

Downy Woodpecker Population Forecast in Colorado

If the recent trend holds, Downy Woodpecker in Colorado is projected to rise about 14% by 2029 — from 0.09 in 2024 to a central estimate of 0.11 (95% range 0.00–0.21). A 5-year backtest shows a typical error of ±64.5%, with 100% of held-out values landing inside the 95% band.

+14%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 →
0.11Projected 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 →
0.00–0.2195% 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 →
±64.5%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, Downy Woodpecker in Colorado is projected to rise about 14% by 2029 — from 0.09 in 2024 to a central estimate of 0.11 (95% range 0.00–0.21). A 5-year backtest shows a typical error of ±64.5%, with 100% 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 →
20250.100.000.21
20260.100.000.21
20270.100.000.21
20280.110.000.21
20290.110.000.21

Downy Woodpecker Survey Routes in Colorado

Routes recording Downy 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 →
Doyle Bridge 21220112007
Haycamp Mesa420222006
Cheesman Lk320241981
Fleming220062006
Colona219981983
Dolores219691969
Colona 2220172015
Blackhead Pk220211991
Flattops220151992
Pinon220242004
Comanche Pk220111996
Mcphee Res.220151996
South Fork220242002
Radium220111998
Maybell119701970
Great Divide120122012
Yampa120231983
Harmony120082003
Douglas Pass119921992
Buford119991994
Aspen120231980
Kiowa120091987
Abarr119931974
Delta119741974
Parlin120231997

Downy Woodpecker Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniaconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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