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Species · Montana · BBS 2026 Release · 1966–2025

Eurasian Collared-Dove Population Trend in Montana

All statesGeneralists

Eurasian Collared-Dove in Montana has surged: up 899% on the route-weighted index since 2008.

+899%Since 2008TrendPercent 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 →
65Routes 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 →
19YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Eurasian Collared-Dove 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 →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Eurasian Collared-Dove has surged in Montana: up 899% on the route-weighted index since 2008.

Eurasian Collared-Dove Population Forecast in Montana

If the recent trend holds, Eurasian Collared-Dove in Montana is projected to rise about 43% by 2030 — from 1.6 in 2025 to a central estimate of 2.3 (95% range 1.7–2.9). A 5-year backtest shows a typical error of ±42.5%, with 40% of held-out values landing inside the 95% band.

+43%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 →
2.3Projected 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 →
1.7–2.995% 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 →
±42.5%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, Eurasian Collared-Dove in Montana is projected to rise about 43% by 2030 — from 1.6 in 2025 to a central estimate of 2.3 (95% range 1.7–2.9). A 5-year backtest shows a typical error of ±42.5%, with 40% of held-out values landing inside the 95% band.20042030
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 →
20262.01.42.6
20272.11.42.7
20282.11.52.8
20292.21.62.9
20302.31.72.9

Eurasian Collared-Dove Survey Routes in Montana

Routes recording Eurasian Collared-Dove 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 →
Willow Creek 21320252008
Church Hill1320252017
Highwood1120252008
Boulder1020252011
Harlem920212004
Reed Point820252009
Kalispell720252009
Glasgow720252018
Victor620252011
Threemile Wa620252011
Clyde Park620252018
Polson520252014
Sun River520252015
Great Falls420252013
Webster420252023
Fort Logan420252018
Wolf Creek420222015
Hebgen Lake420222022
Redstone320252018
Augusta320252008
Roy320242017
St Xavier 2320232017
Laurel320252008
Custer 2320252024
Glentana320242015

Eurasian Collared-Dove Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradofloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamarylandmichiganminnesotamississippimissourinebraskanevadanew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniasouth-carolinasouth-dakotatennesseetexasutahvirginiawashingtonwisconsinwyoming

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