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

Black Swift In Coastal California

All regionsCoastal CaliforniaAerial insectivores

Black Swift in Coastal California has held roughly steady: down 4% on the route-weighted index since 1973.

-4%Since 1973
19Routes In Region
31Years

Notable Signals

No notable trend signals for Black Swift in Coastal California. See the full index history below.

Forecast

If the recent trend holds, Black Swift in Coastal California is projected to rise about 28% by 2029 — from 0.06 in 2024 to a central estimate of 0.08 (95% range 0.00–0.41). A 5-year backtest shows a typical error of ±37.3%, with 100% of held-out values landing inside the 95% band.

+28%Change by 2029
0.08Projected 2029 index
0.00–0.4195% range
±37.3%Backtest error
19712029
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
20250.090.000.41
20260.090.000.41
20270.090.000.41
20280.080.000.41
20290.080.000.41

Routes In Coastal California

Routes recording Black Swift in Coastal California.
Yolla BollyCALIFORNIA481980
SangerCALIFORNIA102018
Lake HemetCALIFORNIA81986
White RiverCALIFORNIA71992
Cal Hot SpgsCALIFORNIA72016
Angelus OaksCALIFORNIA52017
FallsvaleCALIFORNIA41975
RumseyCALIFORNIA31994
Orange CoveCALIFORNIA32004
CohassetCALIFORNIA31980
Carmel ValCALIFORNIA31983
JacksonCALIFORNIA31992
Waterman GapCALIFORNIA32024
Lake SuccessCALIFORNIA21996
LockwoodCALIFORNIA21986
CoyoteCALIFORNIA21984
Foster ParkCALIFORNIA11971
Morro BayCALIFORNIA12004
Mt BaldyCALIFORNIA12015

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