Species · BCR 16 · BBS 2025 Release · 1966–2024
Acorn Woodpecker In Southern Rockies / Colorado Plateau
Acorn Woodpecker in Southern Rockies / Colorado Plateau has fallen sharply: down 72% on the route-weighted index since 1973.
-72%Since 1973
11Routes In Region
34Years
Notable Signals
long arc declinecomputed index
Acorn Woodpecker has fallen sharply in Southern Rockies / Colorado Plateau: down 72% on the route-weighted index since 1973.
Forecast
If the recent trend holds, Acorn Woodpecker in Southern Rockies / Colorado Plateau is projected to fall about 100% by 2027 — from 0.05 in 2022 to a central estimate of 0.00 (95% range 0.00–0.12). A 5-year backtest shows a typical error of ±231.3%, with 100% of held-out values landing inside the 95% band.
-100%Change by 2027
0.00Projected 2027 index
0.00–0.1295% range
±231.3%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2023 | 0.00 | 0.00 | 0.12 |
| 2024 | 0.00 | 0.00 | 0.12 |
| 2025 | 0.00 | 0.00 | 0.12 |
| 2026 | 0.00 | 0.00 | 0.12 |
| 2027 | 0.00 | 0.00 | 0.12 |
Routes In Southern Rockies / Colorado Plateau
| Horse Mtn | NEW-MEXICO | 7 | 2022 |
| Sawmill | ARIZONA | 4 | 2014 |
| Tsaile | ARIZONA | 3 | 2019 |
| Claunch 2 | NEW-MEXICO | 3 | 2021 |
| Horse Spgs | NEW-MEXICO | 2 | 1979 |
| Mcgaffey | NEW-MEXICO | 2 | 2017 |
| Mt. Taylor | NEW-MEXICO | 2 | 1997 |
| Zeniff | ARIZONA | 1 | 1972 |
| Cebolla | NEW-MEXICO | 1 | 2017 |
| Fence Lake | NEW-MEXICO | 1 | 1979 |
| Dulce | NEW-MEXICO | 1 | 2005 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.