BirdAnalyst
Species · BCR 15 · BBS 2025 Release · 1966–2024

Pine Siskin In Sierra Nevada

All regionsSierra NevadaGeneralists

Pine Siskin in Sierra Nevada has collapsed: down 82% on the route-weighted index since 1973.

-82%Since 1973
37Routes In Region
53Years

Notable Signals

long arc declinecomputed index

Pine Siskin has collapsed in Sierra Nevada: down 82% on the route-weighted index since 1973.

Forecast

If the recent trend holds, Pine Siskin in Sierra Nevada is projected to fall about 18% by 2029 — from 0.74 in 2024 to a central estimate of 0.61 (95% range 0.00–2.6). A 5-year backtest shows a typical error of ±211.6%, with 100% of held-out values landing inside the 95% band.

-18%Change by 2029
0.61Projected 2029 index
0.00–2.695% range
±211.6%Backtest error
19712029
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
20250.710.002.7
20260.690.002.7
20270.660.002.7
20280.630.002.7
20290.610.002.6

Routes In Sierra Nevada

Routes recording Pine Siskin in Sierra Nevada.
LakeshoreCALIFORNIA102005
Little TruckeeCALIFORNIA92022
Tuolumne GroveCALIFORNIA72011
Bass LakeCALIFORNIA62011
Butte MeadowCALIFORNIA62013
Meadow ValleyCALIFORNIA62018
Lassen ParkCALIFORNIA51987
Tahoe NfCALIFORNIA51994
ChesterCALIFORNIA52017
Pine MountainCALIFORNIA52009
ChilcootCALIFORNIA52024
Last ChanceCALIFORNIA52019
DardanelleCALIFORNIA42018
JohnsvilleCALIFORNIA42024
WoodfordsCALIFORNIA42024
GeneseeCALIFORNIA42011
Eagle LakeCALIFORNIA31993
CrestviewCALIFORNIA32018
WestvilleCALIFORNIA22016
Cottage SpgsCALIFORNIA21974
RivertonCALIFORNIA22016
Forest HillCALIFORNIA22017
Pollock PinesCALIFORNIA22016
LumberyardCALIFORNIA12018
Greenhorn MtCALIFORNIA11977

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