BirdAnalyst
Species · BCR 32 · BBS 2025 Release · 1966–2024

Anna's Hummingbird In Coastal California

All regionsCoastal CaliforniaGeneralists

Anna's Hummingbird in Coastal California has surged: up 175% on the route-weighted index since 1970.

+175%Since 1970
116Routes In Region
56Years

Notable Signals

long arc increasecomputed index

Anna's Hummingbird has surged in Coastal California: up 175% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Anna's Hummingbird in Coastal California is projected to stay roughly flat through 2029, near 4.5 (95% range 3.5–5.6). A 5-year backtest shows a typical error of ±22.9%, with 60% of held-out values landing inside the 95% band.

+6%Change by 2029
4.5Projected 2029 index
3.5–5.695% range
±22.9%Backtest error
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 index95% low95% high
20254.43.35.4
20264.43.35.5
20274.53.45.5
20284.53.45.6
20294.53.55.6

Routes In Coastal California

Routes recording Anna's Hummingbird in Coastal California.
Elsinore MtnCALIFORNIA392024
MorenoCALIFORNIA192024
Lake CachumaCALIFORNIA172016
FairfaxCALIFORNIA162024
San YsidroCALIFORNIA142019
Green ValleyCALIFORNIA142023
Tres PinosCALIFORNIA112003
PowayCALIFORNIA111980
CoyoteCALIFORNIA112024
Waterman GapCALIFORNIA112024
Tres Pinos 2CALIFORNIA112011
ColmaCALIFORNIA101972
RumseyCALIFORNIA92008
Morro BayCALIFORNIA92019
Lake Hemet 2CALIFORNIA92023
FolsomCALIFORNIA82024
Mt LagunaCALIFORNIA81987
Mt BaldyCALIFORNIA82024
ArvinCALIFORNIA82019
Orange CoveCALIFORNIA72016
SisquocCALIFORNIA72014
AdelaidaCALIFORNIA72024
White RiverCALIFORNIA71992
Mark WestCALIFORNIA72024
Glen EllenCALIFORNIA72004

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