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

Greater Roadrunner In Coastal California

All regionsCoastal CaliforniaArid-land birds

Greater Roadrunner in Coastal California has collapsed: down 86% on the route-weighted index since 1971.

-86%Since 1971
58Routes In Region
55Years

Notable Signals

long arc declinecomputed index

Greater Roadrunner has collapsed in Coastal California: down 86% on the route-weighted index since 1971.

Forecast

If the recent trend holds, Greater Roadrunner in Coastal California is projected to stay roughly flat through 2029, near 0.01 (95% range 0.00–0.16). A 5-year backtest shows a typical error of ±68.4%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029
0.01Projected 2029 index
0.00–0.1695% range
±68.4%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
20250.030.000.17
20260.020.000.17
20270.020.000.16
20280.020.000.16
20290.010.000.16

Routes In Coastal California

Routes recording Greater Roadrunner in Coastal California.
Buena VistaCALIFORNIA32017
Mt PinosCALIFORNIA21994
Big BearCALIFORNIA21981
MaricopaCALIFORNIA21993
SangerCALIFORNIA22021
Red BluffCALIFORNIA11979
Tres PinosCALIFORNIA12003
OilfieldsCALIFORNIA11999
GravesboroCALIFORNIA11974
ParkfieldCALIFORNIA12022
BakersfieldCALIFORNIA11997
Santa YnezCALIFORNIA11997
Harbor LakeCALIFORNIA11982
MorenoCALIFORNIA12022
Oak GroveCALIFORNIA12023
San YsidroCALIFORNIA11987
HollisterCALIFORNIA11992
Orange CoveCALIFORNIA12010
PowayCALIFORNIA11979
OnoCALIFORNIA12006
FolsomCALIFORNIA12022
Sawmill MtnCALIFORNIA11981
El ToroCALIFORNIA11999
Mesa GrandeCALIFORNIA12018
Lockwood ValCALIFORNIA12019

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