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

Pygmy Nuthatch Population Trend in Colorado

All statesForest birds

Pygmy Nuthatch in Colorado has declined: down 27% on the route-weighted index since 1971.

-27%Since 1971
42Routes In State
54Years

Notable Pygmy Nuthatch Trends in Colorado

No notable trend signals for Pygmy Nuthatch in Colorado. See the full index history below.

Pygmy Nuthatch Population Forecast in Colorado

If the recent trend holds, Pygmy Nuthatch in Colorado is projected to fall about 17% by 2029 — from 0.76 in 2024 to a central estimate of 0.64 (95% range 0.09–1.2). A 5-year backtest shows a typical error of ±29.7%, with 100% of held-out values landing inside the 95% band.

-17%Change by 2029
0.64Projected 2029 index
0.09–1.295% range
±29.7%Backtest error
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 index95% low95% high
20250.620.081.2
20260.620.081.2
20270.630.091.2
20280.630.091.2
20290.640.091.2

Pygmy Nuthatch Survey Routes in Colorado

Routes recording Pygmy Nuthatch in Colorado.
Gold Hill2320121999
Elbert2020241998
Deadman Rd.1820241994
Cheesman Lk1320221969
Cortez1220052001
Gribbles Prk820241999
Guffey620241991
Gold Hill 2520242018
Comanche Pk420241995
Marshall Pas420121995
Nucla420242000
Moon Pass420112000
Ludlow420161998
Colona320072006
Dolores Riv319951988
Stillwater Pass320051999
Piedra220241993
Fox Creek220241993
Cokedale220221995
Kiowa 2220242023
Gardner220221999
Blackhead Pk220211991
Douglas Pass120152015
Trail Ridge Road120132013
Kiowa119991976

Pygmy Nuthatch Population Trend in Other States

arizonacaliforniaidahomontananebraskanew-mexicooregonsouth-dakotautahwashingtonwyoming

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