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Species · Idaho · BBS 2026 Release · 1966–2025

Rufous Hummingbird Population Trend in Idaho

All statesForest birds

Rufous Hummingbird in Idaho has declined: down 44% on the route-weighted index since 1973.

-44%Since 1973TrendPercent 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 →
31Routes 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 →
46YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Rufous Hummingbird Trends in IdahoNotable 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 Rufous Hummingbird in Idaho. See the full index history below.

Rufous Hummingbird Population Forecast in Idaho

If the recent trend holds, Rufous Hummingbird in Idaho is projected to rise about 19% by 2030 — from 0.06 in 2025 to a central estimate of 0.07 (95% range 0.00–0.27). A 5-year backtest shows a typical error of ±55.6%, with 100% of held-out values landing inside the 95% band.

+19%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 →
0.07Projected 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 →
0.00–0.2795% 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 →
±55.6%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, Rufous Hummingbird in Idaho is projected to rise about 19% by 2030 — from 0.06 in 2025 to a central estimate of 0.07 (95% range 0.00–0.27). A 5-year backtest shows a typical error of ±55.6%, 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 →
20260.080.000.28
20270.070.000.28
20280.070.000.28
20290.070.000.28
20300.070.000.27

Rufous Hummingbird Survey Routes in Idaho

Routes recording Rufous Hummingbird in Idaho.
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 →
Dougal Res320162015
Naples120241981
Mivoden120191994
Avery120231984
Gifford120151972
Nezperce120051968
Lolo Pass120141994
Grangeville120251986
Golden119931987
N Fork Cda R120051993
Rochat Divde120151995
Cape Horn119931993
Challis119831983
Squirrel119901990
Centerville120111995
Alturas119851985
Triangle119941994
Magic Mtn120251997
Coolin120231994
Marble Creek120221998
Joel119971997
Pierce120071990
Salmon River119951989
Cobalt119921989
Yellow Pine120042004

Rufous Hummingbird Population Trend in Other States

alaskacaliforniamontanaoregonwashingtonwyoming

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