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

Pygmy Nuthatch Population Trend in California

All statesForest birds

Pygmy Nuthatch in California has fallen sharply: down 65% on the route-weighted index since 1970.

-65%Since 1970
80Routes In State
56Years

Notable Pygmy Nuthatch Trends in California

long arc declinecomputed index

Pygmy Nuthatch has fallen sharply in California: down 65% on the route-weighted index since 1970.

Pygmy Nuthatch Population Forecast in California

If the recent trend holds, Pygmy Nuthatch in California is projected to rise about 59% by 2029 — from 0.45 in 2024 to a central estimate of 0.72 (95% range 0.00–1.7). A 5-year backtest shows a typical error of ±76.4%, with 100% of held-out values landing inside the 95% band.

+59%Change by 2029
0.72Projected 2029 index
0.00–1.795% range
±76.4%Backtest error
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 index95% low95% high
20250.770.001.8
20260.760.001.8
20270.740.001.8
20280.730.001.8
20290.720.001.7

Pygmy Nuthatch Survey Routes in California

Routes recording Pygmy Nuthatch in California.
Valyermo4520181970
Mt Laguna4119871970
Big Bear3719861969
Mt Pinos1620041969
Lake Hemet1519861970
Fish Rock1020141968
Lake Hemet 2920232013
Pine Mountain820172000
Westville719761976
Lockwood Val619871983
Sattley620191974
Waterman Gap620241972
Hat Creek620181993
Cleveland Nf620181994
Chilcoot620242023
Fairfax520241972
Green Valley520231970
Tehama519921992
Woodlands520242012
Tionesta520211998
Last Chance520191994
Point Reyes420211972
Navarro420111976
Kelso Valley420241975
Anza 2420242005

Pygmy Nuthatch Population Trend in Other States

arizonacoloradoidahomontananebraskanew-mexicooregonsouth-dakotautahwashingtonwyoming

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