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

Clark's Nutcracker In Coastal California

All regionsCoastal CaliforniaGeneralists

Clark's Nutcracker in Coastal California has collapsed: down 95% on the route-weighted index since 1971.

-95%Since 1971
11Routes In Region
50Years

Notable Signals

long arc declinecomputed index

Clark's Nutcracker has collapsed in Coastal California: down 95% on the route-weighted index since 1971.

Forecast

If the recent trend holds, Clark's Nutcracker in Coastal California is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.59). A 5-year backtest shows a typical error of ±445.6%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029
0.00Projected 2029 index
0.00–0.5995% range
±445.6%Backtest error
19692029
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
20250.000.000.59
20260.000.000.59
20270.000.000.59
20280.000.000.59
20290.000.000.59

Routes In Coastal California

Routes recording Clark's Nutcracker in Coastal California.
Big BearCALIFORNIA191986
FallsvaleCALIFORNIA51972
Mt PinosCALIFORNIA32004
Mt Pinos 2CALIFORNIA32015
MorenoCALIFORNIA21973
Lake HemetCALIFORNIA21986
Green ValleyCALIFORNIA22016
White RiverCALIFORNIA21980
TehamaCALIFORNIA21974
ValyermoCALIFORNIA12019
WoodlandsCALIFORNIA12024

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