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

Bald Eagle In Sierra Nevada

All regionsSierra NevadaGeneralists

Bald Eagle in Sierra Nevada has surged: up 126% on the route-weighted index since 2003.

+126%Since 2003
9Routes In Region
23Years

Notable Signals

long arc increasecomputed index

Bald Eagle has surged in Sierra Nevada: up 126% on the route-weighted index since 2003.

Forecast

If the recent trend holds, Bald Eagle in Sierra Nevada is projected to rise about 33% by 2029 — from 0.10 in 2024 to a central estimate of 0.14 (95% range 0.04–0.24). A 5-year backtest shows a typical error of ±43%, with 60% of held-out values landing inside the 95% band.

+33%Change by 2029
0.14Projected 2029 index
0.04–0.2495% range
±43%Backtest error
20012029
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
20250.130.020.23
20260.130.030.24
20270.130.030.24
20280.140.030.24
20290.140.040.24

Routes In Sierra Nevada

Routes recording Bald Eagle in Sierra Nevada.
WoodfordsCALIFORNIA42022
SattleyCALIFORNIA22024
ChilcootCALIFORNIA22023
StrawberryCALIFORNIA22012
Eagle LakeCALIFORNIA12019
Bass LakeCALIFORNIA12019
GeneseeCALIFORNIA12023
GoumazCALIFORNIA12009
PaxtonCALIFORNIA12010

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