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

Plumbeous Vireo In Sierra Nevada

All regionsSierra NevadaForest birds

Plumbeous Vireo in Sierra Nevada has collapsed: down 91% on the route-weighted index since 1975.

-91%Since 1975
5Routes In Region
38Years

Notable Signals

long arc declinecomputed index

Plumbeous Vireo has collapsed in Sierra Nevada: down 91% on the route-weighted index since 1975.

Forecast

If the recent trend holds, Plumbeous Vireo in Sierra Nevada is projected to fall about 77% by 2029 — from 0.05 in 2024 to a central estimate of 0.01 (95% range 0.00–1.4). A 5-year backtest shows a typical error of ±1071.1%, with 100% of held-out values landing inside the 95% band.

-77%Change by 2029
0.01Projected 2029 index
0.00–1.495% range
±1071.1%Backtest error
19732029
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
20250.100.001.5
20260.080.001.5
20270.060.001.4
20280.030.001.4
20290.010.001.4

Routes In Sierra Nevada

Routes recording Plumbeous Vireo in Sierra Nevada.
Tahoe NfCALIFORNIA171994
LumberyardCALIFORNIA141996
RivertonCALIFORNIA101996
CrestviewCALIFORNIA12024
Last ChanceCALIFORNIA12010

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