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

Osprey In Sierra Nevada

All regionsSierra NevadaGeneralists

Osprey in Sierra Nevada has increased: up 48% on the route-weighted index since 1975.

+48%Since 1975
19Routes In Region
47Years

Notable Signals

No notable trend signals for Osprey in Sierra Nevada. See the full index history below.

Forecast

If the recent trend holds, Osprey in Sierra Nevada is projected to fall about 16% by 2029 — from 0.42 in 2024 to a central estimate of 0.35 (95% range 0.12–0.59). A 5-year backtest shows a typical error of ±45.6%, with 100% of held-out values landing inside the 95% band.

-16%Change by 2029
0.35Projected 2029 index
0.12–0.5995% range
±45.6%Backtest error
19722029
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
20250.340.100.58
20260.340.110.58
20270.350.110.58
20280.350.110.59
20290.350.120.59

Routes In Sierra Nevada

Routes recording Osprey in Sierra Nevada.
Bass LakeCALIFORNIA32018
GeneseeCALIFORNIA32024
ChilcootCALIFORNIA32009
WestvilleCALIFORNIA22017
JohnsvilleCALIFORNIA22015
Higgins CornCALIFORNIA22011
LakeshoreCALIFORNIA22024
ChesterCALIFORNIA22016
Meadow ValleyCALIFORNIA22024
Eagle LakeCALIFORNIA12023
DardanelleCALIFORNIA12014
SattleyCALIFORNIA12016
Butte MeadowCALIFORNIA12013
RivertonCALIFORNIA12019
PaxtonCALIFORNIA12024
Little TruckeeCALIFORNIA12013
Pollock PinesCALIFORNIA12017
WawonaCALIFORNIA12009
StrawberryCALIFORNIA12018

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