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Species · Wyoming · BBS 2026 Release · 1966–2025

Calliope Hummingbird Population Trend in Wyoming

All statesForest birds

Calliope Hummingbird in Wyoming has declined: down 41% on the route-weighted index since 1982.

-41%Since 1982TrendPercent 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 →
13Routes 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 →
40YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Calliope Hummingbird Trends in WyomingNotable 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 Calliope Hummingbird in Wyoming. See the full index history below.

Calliope Hummingbird Population Forecast in Wyoming

If the recent trend holds, Calliope Hummingbird in Wyoming is projected to fall about 50% by 2030 — from 0.07 in 2025 to a central estimate of 0.04 (95% range 0.00–0.14). A 5-year backtest shows a typical error of ±50%, with 100% of held-out values landing inside the 95% band.

-50%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 →
0.04Projected 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 →
0.00–0.1495% 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 →
±50%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, Calliope Hummingbird in Wyoming is projected to fall about 50% by 2030 — from 0.07 in 2025 to a central estimate of 0.04 (95% range 0.00–0.14). A 5-year backtest shows a typical error of ±50%, with 100% of held-out values landing inside the 95% band.19802030
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 →
20260.040.000.14
20270.040.000.14
20280.040.000.14
20290.040.000.14
20300.040.000.14

Calliope Hummingbird Survey Routes in Wyoming

Routes recording Calliope Hummingbird in Wyoming.
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 →
Wilson420251980
Alpine320251989
Moose220162016
Moran220032003
Ne Entrance120062006
Cody119941994
Soda Lake120172017
Colter Bay119971997
Bald Mtn119991999
Buckskin Mtn120051998
Boulder120072007
Fletcher Pk119841983
Riverside119931993

Calliope Hummingbird Population Trend in Other States

californiaidahomontananevadaoregonutahwashington

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