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Species · Wyoming · BBS 2025 Release · 1966–2024

Mountain Chickadee Population Trend in Wyoming

All statesForest birds

Mountain Chickadee in Wyoming has edged up: up 22% on the route-weighted index since 1970.

+22%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 →
54YearsYears 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 rise about 72% by 2029 — from 1.3 in 2024 to a central estimate of 2.2 (95% range 0.93–3.4). A 5-year backtest shows a typical error of ±47.3%, with 100% of held-out values landing inside the 95% band.

+72%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 →
2.2Projected 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 →
0.93–3.495% 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 →
±47.3%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 Wyoming is projected to rise about 72% by 2029 — from 1.3 in 2024 to a central estimate of 2.2 (95% range 0.93–3.4). A 5-year backtest shows a typical error of ±47.3%, with 100% of held-out values landing inside the 95% band.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 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 →
20252.10.843.4
20262.10.863.4
20272.10.893.4
20282.20.913.4
20292.20.933.4

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 →
Yellowstone3120221987
Colter Bay2819991968
Colter Bay 22420242019
West Thumb2219821982
Hayden Val1819861985
Crazy Woman1820241979
Ryan Park1420232011
Hunter Peak1320241982
Fox Park1120241992
Horse Creek1020241980
Ne Entrance820211988
Savery819951989
Moskee719851985
Alpine720241979
Moran720162002
Mammoth620241982
Wilson620241981
Soda Lake620231980
Buckskin Mtn420211980
Warbonnet420241994
Moose320231976
Meeteetse320212005
Bald Mtn320241990
Fiddler Lk320241979
Prior Flats220241991

Mountain Chickadee Population Trend in Other States

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