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

Lewis's Woodpecker In Sierra Nevada

All regionsSierra NevadaForest birds

Lewis's Woodpecker in Sierra Nevada has collapsed: down 86% on the route-weighted index since 1972.

-86%Since 1972
9Routes In Region
28Years

Notable Signals

long arc declinecomputed index

Lewis's Woodpecker has collapsed in Sierra Nevada: down 86% on the route-weighted index since 1972.

Forecast

If the recent trend holds, Lewis's Woodpecker in Sierra Nevada is projected to fall about 100% by 2029 — from 0.05 in 2024 to a central estimate of 0.00 (95% range 0.00–0.23). A 5-year backtest shows a typical error of ±127.1%, with 100% of held-out values landing inside the 95% band.

-100%Change by 2029
0.00Projected 2029 index
0.00–0.2395% range
±127.1%Backtest error
19692029
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
20250.020.000.24
20260.010.000.24
20270.010.000.23
20280.000.000.23
20290.000.000.23

Routes In Sierra Nevada

Routes recording Lewis's Woodpecker in Sierra Nevada.
Last ChanceCALIFORNIA82000
Eagle LakeCALIFORNIA21997
GeneseeCALIFORNIA12024
DownievilleCALIFORNIA11975
RivertonCALIFORNIA11978
Hat CreekCALIFORNIA12018
PaxtonCALIFORNIA12021
PlacervilleCALIFORNIA12004
WawonaCALIFORNIA12004

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