BirdAnalyst
Species · BCR 15 · BBS 2025 Release · 1966–2024

Calliope Hummingbird In Sierra Nevada

All regionsSierra NevadaGeneralists

Calliope Hummingbird in Sierra Nevada has edged down: down 11% on the route-weighted index since 1974.

-11%Since 1974TrendPercent 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 →
24Routes In RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
52YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable SignalsNotable 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 Sierra Nevada. See the full index history below.

Calliope Hummingbird In Sierra Nevada Population Forecast

If the recent trend holds, Calliope Hummingbird in Sierra Nevada is projected to rise about 65% by 2029 — from 0.21 in 2024 to a central estimate of 0.35 (95% range 0.05–0.65). A 5-year backtest shows a typical error of ±80%, with 100% of held-out values landing inside the 95% band.

+65%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 →
0.35Projected 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 →
0.05–0.6595% 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 →
±80%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 Sierra Nevada is projected to rise about 65% by 2029 — from 0.21 in 2024 to a central estimate of 0.35 (95% range 0.05–0.65). A 5-year backtest shows a typical error of ±80%, with 100% of held-out values landing inside the 95% band.19722029
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 →
20250.340.040.64
20260.340.050.64
20270.340.050.64
20280.350.050.64
20290.350.050.65

Routes In Sierra Nevada

Routes recording Calliope Hummingbird in Sierra Nevada.
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 →
Little TruckeeCALIFORNIA32023
ChilcootCALIFORNIA32024
DardanelleCALIFORNIA22006
Kings CanyonCALIFORNIA22010
Butte MeadowCALIFORNIA21989
GoumazCALIFORNIA22011
Last ChanceCALIFORNIA22018
Eagle LakeCALIFORNIA12015
WestvilleCALIFORNIA12019
JohnsvilleCALIFORNIA12021
WoodfordsCALIFORNIA12022
LumberyardCALIFORNIA12019
Greenhorn MtCALIFORNIA12006
Silver CityCALIFORNIA11995
Tuolumne GroveCALIFORNIA12016
GeneseeCALIFORNIA12024
DownievilleCALIFORNIA12003
RivertonCALIFORNIA12019
Hat CreekCALIFORNIA12013
LakeshoreCALIFORNIA12006
PaxtonCALIFORNIA12022
Meadow ValleyCALIFORNIA12018
Pine MountainCALIFORNIA12016
StrawberryCALIFORNIA12010

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