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Species · Montana · BBS 2026 Release · 1966–2025

Common Yellowthroat Population Trend in Montana

All statesForest birds

Common Yellowthroat in Montana has held roughly steady: down 6% on the route-weighted index since 1970.

-6%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 →
101Routes 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 Common Yellowthroat 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 Common Yellowthroat in Montana. See the full index history below.

Common Yellowthroat Population Forecast in Montana

If the recent trend holds, Common Yellowthroat in Montana is projected to fall about 15% by 2030 — from 2.5 in 2025 to a central estimate of 2.1 (95% range 0.94–3.3). A 5-year backtest shows a typical error of ±15.9%, with 100% of held-out values landing inside the 95% band.

-15%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 →
2.1Projected 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 →
0.94–3.395% 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 →
±15.9%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, Common Yellowthroat in Montana is projected to fall about 15% by 2030 — from 2.5 in 2025 to a central estimate of 2.1 (95% range 0.94–3.3). A 5-year backtest shows a typical error of ±15.9%, 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 →
20262.21.03.4
20272.20.993.4
20282.20.983.3
20292.10.963.3
20302.10.943.3

Common Yellowthroat Survey Routes in Montana

Routes recording Common Yellowthroat 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 →
Chestnut1920251968
Pablo Res.1720251995
St Xavier1420111979
Clyde Park1320252018
Sula1220241977
East Glacier Park1220252015
Kalispell1020251968
Augusta1020251976
Westby1020252015
Raynesford1020252016
Flatwillow920081968
Twin Bridges819761968
Wise River820251993
Whitlash720242009
Glasgow620161970
Ninemile620251994
Muddy Creek620152015
Libby Dam520251979
Cleveland520251979
Red Rock520251980
Noxon520221995
Flatwillow 2520232017
Lindsay520242015
Philipsburg520252015
Freeman Creek520162015

Common Yellowthroat Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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