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

American Barn Owl In Coastal California

All regionsCoastal CaliforniaGeneralists

American Barn Owl in Coastal California has fallen sharply: down 52% on the route-weighted index since 1972.

-52%Since 1972
48Routes In Region
43Years

Notable Signals

long arc declinecomputed index

American Barn Owl has fallen sharply in Coastal California: down 52% on the route-weighted index since 1972.

Forecast

If the recent trend holds, American Barn Owl in Coastal California is projected to stay roughly flat through 2029, near 0.04 (95% range 0.00–0.12). A 5-year backtest shows a typical error of ±48.6%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029
0.04Projected 2029 index
0.00–0.1295% range
±48.6%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
20250.040.000.12
20260.040.000.12
20270.040.000.12
20280.040.000.12
20290.040.000.12

Routes In Coastal California

Routes recording American Barn Owl in Coastal California.
MoragaCALIFORNIA42005
AdelaidaCALIFORNIA22021
WestleyCALIFORNIA21977
OnealsCALIFORNIA22016
LivermoreCALIFORNIA21979
TracyCALIFORNIA22004
Tracy 2CALIFORNIA22017
Red BluffCALIFORNIA11977
PenningtonCALIFORNIA11990
RumseyCALIFORNIA11975
RiovistaCALIFORNIA12011
CollegevilleCALIFORNIA11998
HughsonCALIFORNIA12023
Tres PinosCALIFORNIA11981
GravesboroCALIFORNIA11986
ParkfieldCALIFORNIA11975
BakersfieldCALIFORNIA11999
Santa YnezCALIFORNIA11994
Oak GroveCALIFORNIA12018
San YsidroCALIFORNIA11989
HollisterCALIFORNIA12011
Orange CoveCALIFORNIA11993
Lake SuccessCALIFORNIA11980
Morro BayCALIFORNIA11993
Point ReyesCALIFORNIA12012

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