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Species · Idaho · BBS 2025 Release · 1966–2024

Chestnut-backed Chickadee Population Trend in Idaho

All statesForest birds

Chestnut-backed Chickadee in Idaho has surged: up 207% on the route-weighted index since 1979.

+207%Since 1979
15Routes In State
42Years

Notable Chestnut-backed Chickadee Trends in Idaho

long arc increasecomputed index

Chestnut-backed Chickadee has surged in Idaho: up 207% on the route-weighted index since 1979.

Chestnut-backed Chickadee Population Forecast in Idaho

If the recent trend holds, Chestnut-backed Chickadee in Idaho is projected to rise about 63% by 2029 — from 0.84 in 2024 to a central estimate of 1.4 (95% range 0.70–2.0). A 5-year backtest shows a typical error of ±33.6%, with 100% of held-out values landing inside the 95% band.

+63%Change by 2029
1.4Projected 2029 index
0.70–2.095% range
±33.6%Backtest error
19772029
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
20251.30.611.9
20261.30.642.0
20271.30.662.0
20281.30.682.0
20291.40.702.0

Chestnut-backed Chickadee Survey Routes in Idaho

Routes recording Chestnut-backed Chickadee in Idaho.
N Fork Cda R1220191993
Coolin1120241986
Pierce1020071995
Naples620241978
Mivoden620231977
Marble Creek620231988
Rochat Divde620231994
Baldy Mountain620142013
Grangeville420241994
Lolo Pass320191993
Nezperce220081995
Avery120231991
Golden120132003
Nezperce Nf119981998
Salmon River120091990

Chestnut-backed Chickadee Population Trend in Other States

alaskacaliforniamontanaoregonwashington

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