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

Common Nighthawk In Coastal California

All regionsCoastal CaliforniaAerial insectivores

Common Nighthawk in Coastal California has collapsed: down 75% on the route-weighted index since 1970.

-75%Since 1970
16Routes In Region
33Years

Notable Signals

long arc declinecomputed index

Common Nighthawk has collapsed in Coastal California: down 75% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Common Nighthawk in Coastal California is projected to stay roughly flat through 2029, near 0.01 (95% range 0.00–0.12). A 5-year backtest shows a typical error of ±117.6%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029
0.01Projected 2029 index
0.00–0.1295% range
±117.6%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
20250.010.000.13
20260.010.000.13
20270.010.000.13
20280.010.000.13
20290.010.000.12

Routes In Coastal California

Routes recording Common Nighthawk in Coastal California.
Red BluffCALIFORNIA32019
Big BearCALIFORNIA31986
FallsvaleCALIFORNIA21975
AnzaCALIFORNIA21970
MorenoCALIFORNIA12012
Lake SuccessCALIFORNIA11977
Point ReyesCALIFORNIA11974
CohassetCALIFORNIA12012
Green ValleyCALIFORNIA11975
Gold HillCALIFORNIA11980
OrovilleCALIFORNIA11990
TehamaCALIFORNIA12010
ReddingCALIFORNIA11983
CopperopolisCALIFORNIA12003
Angelus OaksCALIFORNIA11990
WoodlandsCALIFORNIA12024

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