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Species · Montana · BBS 2026 Release · 1966–2025

Ruby-crowned Kinglet Population Trend in Montana

All statesForest birds

Ruby-crowned Kinglet in Montana has increased: up 45% on the route-weighted index since 1970.

+45%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 →
52Routes 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 →
57YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Ruby-crowned Kinglet Trends in MontanaNotable 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 Ruby-crowned Kinglet in Montana. See the full index history below.

Ruby-crowned Kinglet Population Forecast in Montana

If the recent trend holds, Ruby-crowned Kinglet in Montana is projected to rise about 69% by 2030 — from 3.7 in 2025 to a central estimate of 6.2 (95% range 3.6–8.8). A 5-year backtest shows a typical error of ±87.2%, with 0% of held-out values landing inside the 95% band.

+69%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 →
6.2Projected 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 →
3.6–8.895% 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 →
±87.2%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, Ruby-crowned Kinglet in Montana is projected to rise about 69% by 2030 — from 3.7 in 2025 to a central estimate of 6.2 (95% range 3.6–8.8). A 5-year backtest shows a typical error of ±87.2%, with 0% 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 →
20265.93.38.5
20276.03.48.6
20286.03.48.7
20296.13.58.7
20306.23.68.8

Ruby-crowned Kinglet Survey Routes in Montana

Routes recording Ruby-crowned Kinglet in Montana.
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 →
Pagil Gulch4220252015
Hebgen Lake3020252017
Woodman2920251968
Sula2620241977
Pryor Mtn.2520251995
Cramer Creek2320191994
Skalkho-Rye2320221999
Greenoagh 31820252012
Maynard Coulee1720252017
Inside Road1620251990
Fish Creek1620241995
Greenough1520041996
Elliston1420251968
Greenoagh 21420112005
Threemile Wa1320251993
Ninemile1120251993
Chestnut1020251968
Victor920251993
Arlee920251968
Philipsburg920252016
Logan Pass720251980
East Glacier Park720252015
Skalkaho719981992
Clancy620252015
Wise River620251993

Ruby-crowned Kinglet Population Trend in Other States

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