BirdAnalyst
Species · Idaho · BBS 2025 Release · 1966–2024

Calliope Hummingbird Population Trend in Idaho

All statesGeneralists

Calliope Hummingbird in Idaho has risen sharply: up 57% on the route-weighted index since 1973.

+57%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 →
48YearsYears 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 IdahoNotable 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 →

Calliope Hummingbird has risen sharply in Idaho: up 57% on the route-weighted index since 1973.

Calliope Hummingbird Population Forecast in Idaho

If the recent trend holds, Calliope Hummingbird in Idaho is projected to stay roughly flat through 2029, near 0.43 (95% range 0.00–0.94). A 5-year backtest shows a typical error of ±93.6%, with 100% of held-out values landing inside the 95% band.

+8%Change by 2029TrendPercent 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 →
0.43Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.9495% 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 →
±93.6%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, Calliope Hummingbird in Idaho is projected to stay roughly flat through 2029, near 0.43 (95% range 0.00–0.94). A 5-year backtest shows a typical error of ±93.6%, with 100% of held-out values landing inside the 95% band.19682029
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 →
20250.430.000.94
20260.430.000.94
20270.430.000.94
20280.430.000.94
20290.430.000.94

Calliope Hummingbird Survey Routes in Idaho

Routes recording Calliope 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 →
Magic Mtn720241987
Squirrel420041977
Cascade319841978
Bates320091989
Naples220241975
Mivoden220231977
Rochat Divde219931993
Sunbeam220071994
Dougal Res220192003
Gifford120171986
Nezperce120061968
Lolo Pass120161994
Golden119941994
N Fork Cda R119931993
Challis120221978
Centerville120191972
Alturas119871987
Triangle120041998
Pocatello119921992
Coolin120151989
Sawtooth City 2120232017
Marble Creek119901990
Joel119931993
Pierce120072007
Salmon River119941988

Calliope Hummingbird Population Trend in Other States

californiamontananevadaoregonutahwashingtonwyoming

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.