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Species · Wyoming · BBS 2026 Release · 1966–2025

Mountain Chickadee Population Trend in Wyoming

All statesForest birds

Mountain Chickadee in Wyoming has increased: up 35% on the route-weighted index since 1970.

+35%Since 1970TrendPercent 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 →
38Routes 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 →
55YearsYears 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 WyomingNotable 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 Wyoming. See the full index history below.

Mountain Chickadee Population Forecast in Wyoming

If the recent trend holds, Mountain Chickadee in Wyoming is projected to stay roughly flat through 2030, near 2.2 (95% range 1.0–3.5). A 5-year backtest shows a typical error of ±21.2%, with 100% of held-out values landing inside the 95% band.

+5%Change by 2030TrendPercent 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 →
2.2Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
1.0–3.595% 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 →
±21.2%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 Wyoming is projected to stay roughly flat through 2030, near 2.2 (95% range 1.0–3.5). A 5-year backtest shows a typical error of ±21.2%, with 100% of held-out values landing inside the 95% band.19682030
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 →
20262.20.933.4
20272.20.953.4
20282.20.973.4
20292.20.993.5
20302.21.03.5

Mountain Chickadee Survey Routes in Wyoming

Routes recording Mountain Chickadee in Wyoming.
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 →
Ryan Park5620252011
Colter Bay2819991968
West Thumb2219821982
Yellowstone1920251987
Hayden Val1819861985
Crazy Woman1820241979
Bald Mtn1720251990
Colter Bay 21420252019
Soda Lake1420251980
Mammoth1020251982
Horse Creek1020251980
Savery819951989
Warbonnet820251994
Hunter Peak720251982
Moskee719851985
Buckskin Mtn720251980
Moran720162002
Fletcher Pk620251979
Ne Entrance520251988
Big Sandy520252005
Fox Park520251992
Prior Flats420251991
Fiddler Lk420251979
Meeteetse320212005
Wilson320251981

Mountain Chickadee Population Trend in Other States

arizonacaliforniacoloradoidahomontananevadanew-mexicooregonutahwashington

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.