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

Pygmy Nuthatch Population Trend in Idaho

All statesForest birds

Pygmy Nuthatch in Idaho has fallen sharply: down 75% on the route-weighted index since 1989.

-75%Since 1989
6Routes In State
27Years

Notable Pygmy Nuthatch Trends in Idaho

long arc declinecomputed index

Pygmy Nuthatch has fallen sharply in Idaho: down 75% on the route-weighted index since 1989.

Pygmy Nuthatch Population Forecast in Idaho

If the recent trend holds, Pygmy Nuthatch in Idaho is projected to stay roughly flat through 2029, near 0.01 (95% range 0.00–0.13). A 5-year backtest shows a typical error of ±75.7%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029
0.01Projected 2029 index
0.00–0.1395% range
±75.7%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
20250.020.000.14
20260.020.000.14
20270.010.000.13
20280.010.000.13
20290.010.000.13

Pygmy Nuthatch Survey Routes in Idaho

Routes recording Pygmy Nuthatch in Idaho.
Salmon River320212021
Alturas219681968
Featherville220052000
Gifford120171986
Joel120241989
Coolin120151995

Pygmy Nuthatch Population Trend in Other States

arizonacaliforniacoloradomontananebraskanew-mexicooregonsouth-dakotautahwashingtonwyoming

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