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

Yellow-billed Magpie In Coastal California

All regionsCoastal CaliforniaGeneralists

Yellow-billed Magpie in Coastal California has declined: down 34% on the route-weighted index since 1970.

-34%Since 1970
47Routes In Region
56Years

Notable Signals

No notable trend signals for Yellow-billed Magpie in Coastal California. See the full index history below.

Forecast

If the recent trend holds, Yellow-billed Magpie in Coastal California is projected to rise about 43% by 2029 — from 3.1 in 2024 to a central estimate of 4.5 (95% range 0.00–10). A 5-year backtest shows a typical error of ±97.8%, with 100% of held-out values landing inside the 95% band.

+43%Change by 2029
4.5Projected 2029 index
0.00–1095% range
±97.8%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
20254.90.0011
20264.80.0010
20274.70.0010
20284.60.0010
20294.50.0010

Routes In Coastal California

Routes recording Yellow-billed Magpie in Coastal California.
CollegevilleCALIFORNIA462004
AtwaterCALIFORNIA402004
Tres Pinos 2CALIFORNIA362011
AthloneCALIFORNIA212004
JacksonCALIFORNIA201992
HughsonCALIFORNIA192024
CoyoteCALIFORNIA162024
GreenfieldCALIFORNIA152024
AdelaidaCALIFORNIA142024
LockwoodCALIFORNIA132024
Collegeville 2CALIFORNIA132023
Tres PinosCALIFORNIA112003
WestleyCALIFORNIA112024
ZamoraCALIFORNIA112024
CrestonCALIFORNIA102024
ReddingCALIFORNIA91983
CordovaCALIFORNIA81981
OrovilleCALIFORNIA82024
Ora LomaCALIFORNIA81995
RumseyCALIFORNIA62008
Carmel ValCALIFORNIA62024
OnealsCALIFORNIA62005
Staten Is.CALIFORNIA62024
TomheadCALIFORNIA62011
CohassetCALIFORNIA52024

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