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Species · Idaho · BBS 2025 Release · 1966–2024

Mountain Chickadee Population Trend in Idaho

All statesForest birds

Mountain Chickadee in Idaho has increased: up 27% on the route-weighted index since 1973.

+27%Since 1973TrendPercent 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 →
41Routes 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 →
53YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Mountain Chickadee Trends in IdahoNotable 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 Mountain Chickadee in Idaho. See the full index history below.

Mountain Chickadee Population Forecast in Idaho

If the recent trend holds, Mountain Chickadee in Idaho is projected to fall about 19% by 2029 — from 2.0 in 2024 to a central estimate of 1.7 (95% range 0.64–2.7). A 5-year backtest shows a typical error of ±44.3%, with 100% of held-out values landing inside the 95% band.

-19%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 →
1.7Projected 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 →
0.64–2.795% 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 →
±44.3%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, Mountain Chickadee in Idaho is projected to fall about 19% by 2029 — from 2.0 in 2024 to a central estimate of 1.7 (95% range 0.64–2.7). A 5-year backtest shows a typical error of ±44.3%, with 100% of held-out values landing inside the 95% band.19712029
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 →
20251.60.602.6
20261.60.612.6
20271.60.622.7
20281.60.632.7
20291.70.642.7

Mountain Chickadee Survey Routes in Idaho

Routes recording Mountain Chickadee in Idaho.
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 →
Cobalt1920241989
Avery1020221979
Grangeville820241986
Cascade719841978
Cape Horn720241986
Deep Creek519851985
Sawtooth City 2520242015
Lolo Pass420191992
Baker420171996
Squirrel420241971
Golden320141987
Challis320241975
Rochat Divde320231993
Magic Mtn320241987
Featherville320221989
Sawtooth Cty320141988
Naples219811973
Mivoden220231987
Centerville220051973
Alturas219871986
Baldy Mountain220162013
Yellow Pine220161989
Cabarton220231985
Gifford119951995
Nezperce119981985

Mountain Chickadee Population Trend in Other States

arizonacaliforniacoloradomontananevadanew-mexicooregonutahwashingtonwyoming

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