Species · BCR 4 · BBS 2025 Release · 1966–2024
Chipping Sparrow In BCR 4
Chipping Sparrow in BCR 4 has held roughly steady: up 1% on the route-weighted index since 1990.
+1%Since 1990
27Routes In Region
36Years
Notable Signals
No notable trend signals for Chipping Sparrow in BCR 4. See the full index history below.
Forecast
If the recent trend holds, Chipping Sparrow in BCR 4 is projected to rise about 71% by 2029 — from 0.50 in 2024 to a central estimate of 0.86 (95% range 0.14–1.6). A 5-year backtest shows a typical error of ±208.5%, with 80% of held-out values landing inside the 95% band.
+71%Change by 2029
0.86Projected 2029 index
0.14–1.695% range
±208.5%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.81 | 0.09 | 1.5 |
| 2026 | 0.82 | 0.11 | 1.5 |
| 2027 | 0.83 | 0.12 | 1.5 |
| 2028 | 0.84 | 0.13 | 1.6 |
| 2029 | 0.86 | 0.14 | 1.6 |
Routes In BCR 4
| Slana | ALASKA | 11 | 2022 |
| Northway | ALASKA | 5 | 2023 |
| Sourdough | ALASKA | 5 | 2024 |
| Tower Bluffs | ALASKA | 4 | 2023 |
| Delta | ALASKA | 4 | 2024 |
| Eagle | ALASKA | 3 | 2024 |
| Circle | ALASKA | 2 | 2022 |
| Chatanika R | ALASKA | 2 | 2023 |
| Birch Lake | ALASKA | 2 | 2021 |
| Petersville | ALASKA | 2 | 2024 |
| Koyukuk Riv. | ALASKA | 2 | 1998 |
| Livengood | ALASKA | 1 | 2012 |
| Chistochina | ALASKA | 1 | 2023 |
| Monahan | ALASKA | 1 | 1996 |
| Kenny Lake | ALASKA | 1 | 2024 |
| Chicken | ALASKA | 1 | 2024 |
| Swan Lake Rd | ALASKA | 1 | 1995 |
| Chena Hot Spring 2 | ALASKA | 1 | 2021 |
| Lake Louise | ALASKA | 1 | 2008 |
| Seven Lakes | ALASKA | 1 | 1995 |
| Donelly Dome | ALASKA | 1 | 2024 |
| Kanuti Canyn | ALASKA | 1 | 2023 |
| Mt. Fairplay | ALASKA | 1 | 2019 |
| Porcupine R. | ALASKA | 1 | 2001 |
| Kanuti Lake | ALASKA | 1 | 2018 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.