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

Orange-crowned Warbler In Sierra Nevada

All regionsSierra NevadaForest birds

Orange-crowned Warbler in Sierra Nevada has held roughly steady: down 5% on the route-weighted index since 1973.

-5%Since 1973
34Routes In Region
53Years

Notable Signals

No notable trend signals for Orange-crowned Warbler in Sierra Nevada. See the full index history below.

Forecast

If the recent trend holds, Orange-crowned Warbler in Sierra Nevada is projected to stay roughly flat through 2029, near 1.8 (95% range 0.00–4.0). A 5-year backtest shows a typical error of ±15.7%, with 100% of held-out values landing inside the 95% band.

+6%Change by 2029
1.8Projected 2029 index
0.00–4.095% range
±15.7%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
20251.80.004.1
20261.80.004.1
20271.80.004.1
20281.80.004.1
20291.80.004.0

Routes In Sierra Nevada

Routes recording Orange-crowned Warbler in Sierra Nevada.
ChilcootCALIFORNIA222009
Higgins CornCALIFORNIA122024
PlacervilleCALIFORNIA92024
Forest Hill 2CALIFORNIA82005
WawonaCALIFORNIA52024
Tahoe NfCALIFORNIA41994
Forest HillCALIFORNIA42022
WestvilleCALIFORNIA32024
Lassen ParkCALIFORNIA21987
LumberyardCALIFORNIA22017
Butte MeadowCALIFORNIA21996
Hat CreekCALIFORNIA22016
LakeshoreCALIFORNIA22024
Chaos CraterCALIFORNIA22003
PaxtonCALIFORNIA22021
Meadow ValleyCALIFORNIA22019
Pine MountainCALIFORNIA22015
Last ChanceCALIFORNIA22018
Eagle LakeCALIFORNIA12014
DardanelleCALIFORNIA12017
Bass LakeCALIFORNIA12018
JohnsvilleCALIFORNIA12023
WoodfordsCALIFORNIA12019
Greenhorn MtCALIFORNIA11995
Silver CityCALIFORNIA12011

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