Species · BCR 5 · BBS 2025 Release · 1966–2024
Black-billed Magpie In Northern Pacific Rainforest
Black-billed Magpie in Northern Pacific Rainforest has fallen sharply: down 67% on the route-weighted index since 1974.
-67%Since 1974
16Routes In Region
52Years
Notable Signals
long arc declinecomputed index
Black-billed Magpie has fallen sharply in Northern Pacific Rainforest: down 67% on the route-weighted index since 1974.
Forecast
If the recent trend holds, Black-billed Magpie in Northern Pacific Rainforest is projected to rise about 366% by 2029 — from 0.05 in 2024 to a central estimate of 0.25 (95% range 0.00–0.52). A 5-year backtest shows a typical error of ±257.3%, with 80% of held-out values landing inside the 95% band.
+366%Change by 2029
0.25Projected 2029 index
0.00–0.5295% range
±257.3%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.25 | 0.00 | 0.52 |
| 2026 | 0.25 | 0.00 | 0.52 |
| 2027 | 0.25 | 0.00 | 0.52 |
| 2028 | 0.25 | 0.00 | 0.52 |
| 2029 | 0.25 | 0.00 | 0.52 |
Routes In Northern Pacific Rainforest
| Yakutat (Short) | ALASKA | 16 | 1984 |
| Gazelle | CALIFORNIA | 13 | 2021 |
| Yreka | CALIFORNIA | 5 | 2019 |
| Sheep Mtn | ALASKA | 4 | 2017 |
| Moose Pass | ALASKA | 4 | 1992 |
| Hope | ALASKA | 4 | 2023 |
| Seward | ALASKA | 3 | 1992 |
| Thompson Pas | ALASKA | 3 | 2024 |
| Mt Shasta | CALIFORNIA | 3 | 2019 |
| Kenai Lake (Short) | ALASKA | 2 | 1992 |
| Copper River | ALASKA | 2 | 2010 |
| Haines | ALASKA | 1 | 1995 |
| Cordova | ALASKA | 1 | 2024 |
| Yakutat | ALASKA | 1 | 2011 |
| Alpenglow (Short) | ALASKA | 1 | 1999 |
| Emigrant Lake 2 | OREGON | 1 | 2010 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.