Species · BCR 5 · BBS 2025 Release · 1966–2024
Lark Sparrow In Northern Pacific Rainforest
Lark Sparrow in Northern Pacific Rainforest has collapsed: down 95% on the route-weighted index since 1970.
-95%Since 1970
21Routes In Region
55Years
Notable Signals
long arc declinecomputed index
Lark Sparrow has collapsed in Northern Pacific Rainforest: down 95% on the route-weighted index since 1970.
Forecast
If the recent trend holds, Lark Sparrow in Northern Pacific Rainforest is projected to stay roughly flat through 2028, near 0.00 (95% range 0.00–0.36). A 5-year backtest shows a typical error of ±445.1%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2028
0.00Projected 2028 index
0.00–0.3695% range
±445.1%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2024 | 0.00 | 0.00 | 0.36 |
| 2025 | 0.00 | 0.00 | 0.36 |
| 2026 | 0.00 | 0.00 | 0.36 |
| 2027 | 0.00 | 0.00 | 0.36 |
| 2028 | 0.00 | 0.00 | 0.36 |
Routes In Northern Pacific Rainforest
| Alderpoint | CALIFORNIA | 9 | 2012 |
| Mccloud | CALIFORNIA | 6 | 1982 |
| Hullville | CALIFORNIA | 4 | 2016 |
| Bodega Bay | CALIFORNIA | 4 | 2004 |
| Yreka | CALIFORNIA | 3 | 2019 |
| Emigrant Lake 2 | OREGON | 3 | 2021 |
| Holmes | CALIFORNIA | 2 | 2008 |
| Derby | OREGON | 2 | 1990 |
| Dayton | OREGON | 2 | 1976 |
| Emigrant Lk | OREGON | 2 | 1992 |
| Sams Valley | OREGON | 2 | 2022 |
| Honeydew | CALIFORNIA | 1 | 2016 |
| Fish Rock | CALIFORNIA | 1 | 1994 |
| Rio Dell | CALIFORNIA | 1 | 2006 |
| Longvale | CALIFORNIA | 1 | 2023 |
| Mt Shasta | CALIFORNIA | 1 | 2018 |
| Laytonville | CALIFORNIA | 1 | 1987 |
| Ukiah | CALIFORNIA | 1 | 2001 |
| Gazelle | CALIFORNIA | 1 | 2009 |
| Umpqua | OREGON | 1 | 1994 |
| Days Creek | OREGON | 1 | 1974 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.