BirdAnalyst
Species · BCR 34 · BBS 2025 Release · 1966–2024

Williamson's Sapsucker In Sierra Madre Occidental

All regionsSierra Madre OccidentalForest birds

Williamson's Sapsucker in Sierra Madre Occidental has declined: down 41% on the route-weighted index since 1985.

-41%Since 1985
7Routes In Region
23Years

Notable Signals

No notable trend signals for Williamson's Sapsucker in Sierra Madre Occidental. See the full index history below.

Forecast

If the recent trend holds, Williamson's Sapsucker in Sierra Madre Occidental is projected to stay roughly flat through 2028, near 0.08 (95% range 0.00–0.27). A 5-year backtest shows a typical error of ±155.5%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2028
0.08Projected 2028 index
0.00–0.2795% range
±155.5%Backtest error
19742028
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
20240.090.000.27
20250.090.000.27
20260.080.000.27
20270.080.000.27
20280.080.000.27

Routes In Sierra Madre Occidental

Routes recording Williamson's Sapsucker in Sierra Madre Occidental.
SprucedaleARIZONA22019
FlagstaffARIZONA11994
BlueARIZONA11985
Forest LakesARIZONA11994
PinetopARIZONA12022
AlpineARIZONA12023
Happy JackARIZONA11977

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