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Species · California · BBS 2025 Release · 1966–2024

Calliope Hummingbird Population Trend in California

All statesGeneralists

Calliope Hummingbird in California has declined: down 43% on the route-weighted index since 1971.

-43%Since 1971
51Routes In State
55Years

Notable Calliope Hummingbird Trends in California

No notable trend signals for Calliope Hummingbird in California. See the full index history below.

Calliope Hummingbird Population Forecast in California

If the recent trend holds, Calliope Hummingbird in California is projected to stay roughly flat through 2029, near 0.11 (95% range 0.01–0.20). A 5-year backtest shows a typical error of ±147.8%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029
0.11Projected 2029 index
0.01–0.2095% range
±147.8%Backtest error
19692029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20250.100.010.20
20260.100.010.20
20270.100.010.20
20280.100.010.20
20290.110.010.20

Calliope Hummingbird Survey Routes in California

Routes recording Calliope Hummingbird in California.
Big Bear719811969
Gazelle420041988
Dirigio320071999
Little Truckee320231997
Chilcoot320241998
Kings Canyon220102010
Dardanelle220061972
Goumaz220111997
Medicine Mtn.220122006
Butte Meadow219891976
Last Chance220181993
Yreka219861986
Horse Creek119811981
Green Valley120231972
Nubieber120021997
Iron Gate120182018
Eagle Lake120151983
Westville120192013
Whiskeytown120072002
Hackamore120062002
Tionesta120182001
Crowder Flat120052002
Gold Hill119851985
Crowley Lake120042004
French Gulch120072002

Calliope Hummingbird Population Trend in Other States

idahomontananevadaoregonutahwashingtonwyoming

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