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Species · Colorado · BBS 2026 Release · 1966–2025

Broad-tailed Hummingbird Population Trend in Colorado

All statesForest birds

Broad-tailed Hummingbird in Colorado has held roughly steady: down 1% on the route-weighted index since 1970.

-1%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 →
108Routes 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 Broad-tailed Hummingbird Trends in ColoradoNotable 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 Broad-tailed Hummingbird in Colorado. See the full index history below.

Broad-tailed Hummingbird Population Forecast in Colorado

If the recent trend holds, Broad-tailed Hummingbird in Colorado is projected to rise about 15% by 2030 — from 5.7 in 2025 to a central estimate of 6.5 (95% range 4.2–8.9). A 5-year backtest shows a typical error of ±34.1%, with 80% 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 →
6.5Projected 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 →
4.2–8.995% 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 →
±34.1%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, Broad-tailed Hummingbird in Colorado is projected to rise about 15% by 2030 — from 5.7 in 2025 to a central estimate of 6.5 (95% range 4.2–8.9). A 5-year backtest shows a typical error of ±34.1%, with 80% 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 →
20266.44.18.7
20276.44.18.8
20286.54.18.8
20296.54.28.8
20306.54.28.9

Broad-tailed Hummingbird Survey Routes in Colorado

Routes recording Broad-tailed Hummingbird in Colorado.
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 →
Tincup4420251992
Stillwater Pass4420091998
Gold Hill3520121998
Gold Hill 23420252018
Aspen3120251979
Parlin3020251968
Lost Lake3020251990
Tarryall2820251988
Trail Ridge Road2820142003
Comanche Pk2620241994
Rollins Pass2320251998
Wet Mtns.2220251993
Heeney2220192017
Steamboat L.2120251996
Castleton2020251988
Fox Creek2020251993
Weston Pass 22020252001
Stillwater Pass 22020252010
Deadman Rd.1920251992
Rifle Falls1820251998
Thomasville1620251992
Heeney 21520252025
Dolores Riv1420251988
Elbert1420251998
Pinos Creek1219901988

Broad-tailed Hummingbird Population Trend in Other States

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