Species · BCR 5 · BBS 2025 Release · 1966–2024
American Bittern In Northern Pacific Rainforest
American Bittern in Northern Pacific Rainforest has fallen sharply: down 68% on the route-weighted index since 1976.
-68%Since 1976
24Routes In Region
46Years
Notable Signals
long arc declinecomputed index
American Bittern has fallen sharply in Northern Pacific Rainforest: down 68% on the route-weighted index since 1976.
Forecast
If the recent trend holds, American Bittern in Northern Pacific Rainforest is projected to stay roughly flat through 2029, near 0.01 (95% range 0.00–0.07). A 5-year backtest shows a typical error of ±90.7%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2029
0.01Projected 2029 index
0.00–0.0795% range
±90.7%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.02 | 0.00 | 0.07 |
| 2026 | 0.02 | 0.00 | 0.07 |
| 2027 | 0.01 | 0.00 | 0.07 |
| 2028 | 0.01 | 0.00 | 0.07 |
| 2029 | 0.01 | 0.00 | 0.07 |
Routes In Northern Pacific Rainforest
| Mendota 2 | WASHINGTON | 3 | 2000 |
| Whiskeytown | CALIFORNIA | 2 | 2005 |
| Issaquah | WASHINGTON | 2 | 1986 |
| South Elma | WASHINGTON | 2 | 2005 |
| Stikine River | ALASKA | 1 | 2009 |
| Yreka | CALIFORNIA | 1 | 2017 |
| Gazelle | CALIFORNIA | 1 | 2016 |
| Tualatin | OREGON | 1 | 1994 |
| Days Creek | OREGON | 1 | 2011 |
| Adair | OREGON | 1 | 2012 |
| Dayton | OREGON | 1 | 1993 |
| Elk Lake | OREGON | 1 | 2024 |
| Sams Valley | OREGON | 1 | 1994 |
| Nicolai Mtn. | OREGON | 1 | 1997 |
| Coquille | OREGON | 1 | 2023 |
| Taholah | WASHINGTON | 1 | 1989 |
| Kamilche | WASHINGTON | 1 | 1988 |
| Everett | WASHINGTON | 1 | 1998 |
| Ilwaco | WASHINGTON | 1 | 1990 |
| Mendota | WASHINGTON | 1 | 1988 |
| Raymond | WASHINGTON | 1 | 1994 |
| Mukilteo | WASHINGTON | 1 | 1998 |
| Carnation | WASHINGTON | 1 | 2018 |
| Mendota 3 | WASHINGTON | 1 | 2024 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.