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Species · Washington · BBS 2025 Release · 1966–2024

Calliope Hummingbird Population Trend in Washington

All statesGeneralists

Calliope Hummingbird in Washington has fallen sharply: down 73% on the route-weighted index since 1970.

-73%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 →
32Routes 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 →
55YearsYears 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 WashingtonNotable 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 declinecomputed 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 fallen sharply in Washington: down 73% on the route-weighted index since 1970.

Calliope Hummingbird Population Forecast in Washington

If the recent trend holds, Calliope Hummingbird in Washington is projected to rise about 116% by 2029 — from 0.09 in 2024 to a central estimate of 0.19 (95% range 0.00–0.46). A 5-year backtest shows a typical error of ±96.6%, with 100% of held-out values landing inside the 95% band.

+116%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 →
0.19Projected 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 →
0.00–0.4695% 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 →
±96.6%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 Washington is projected to rise about 116% by 2029 — from 0.09 in 2024 to a central estimate of 0.19 (95% range 0.00–0.46). A 5-year backtest shows a typical error of ±96.6%, 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 →
20250.200.000.47
20260.200.000.47
20270.190.000.46
20280.190.000.46
20290.190.000.46

Calliope Hummingbird Survey Routes in Washington

Routes recording Calliope Hummingbird in Washington.
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 →
Twisp420221969
Spring Lake419941986
L Pend O Nwr320232000
Twin Lakes319851983
Curlew320131992
Reardan220141991
Snowden219861986
Tonasket220161984
Ellensburg220182007
Blewett Pass220241998
Waitsburg220011995
Mazama220221994
Laurier220221995
Deer Park220121995
Keller120071969
Chewelah120211978
Deception119981998
Ardenvoir119871968
E. Mt. Adams119991998
Rimrock120161968
Winthrop120071985
Cusick120242005
Ronald120191973
Leavenworth120231981
Wilbur120181995

Calliope Hummingbird Population Trend in Other States

californiaidahomontananevadaoregonutahwyoming

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