Species · BCR 5 · BBS 2025 Release · 1966–2024
Heermann's Gull In Northern Pacific Rainforest
Heermann's Gull in Northern Pacific Rainforest has collapsed: down 86% on the route-weighted index since 1981.
-86%Since 1981
7Routes In Region
23Years
Notable Signals
long arc declinecomputed index
Heermann's Gull has collapsed in Northern Pacific Rainforest: down 86% on the route-weighted index since 1981.
Forecast
If the recent trend holds, Heermann's Gull in Northern Pacific Rainforest is projected to stay roughly flat through 2022, near 0.03 (95% range 0.00–0.33). A 5-year backtest shows a typical error of ±458.4%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2022
0.03Projected 2022 index
0.00–0.3395% range
±458.4%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2018 | 0.04 | 0.00 | 0.34 |
| 2019 | 0.04 | 0.00 | 0.34 |
| 2020 | 0.04 | 0.00 | 0.34 |
| 2021 | 0.03 | 0.00 | 0.33 |
| 2022 | 0.03 | 0.00 | 0.33 |
Routes In Northern Pacific Rainforest
| Hazel Camp | OREGON | 20 | 2001 |
| Taholah | WASHINGTON | 4 | 1987 |
| Fish Rock | CALIFORNIA | 3 | 2003 |
| Honeydew | CALIFORNIA | 1 | 2014 |
| Bodega Bay | CALIFORNIA | 1 | 2017 |
| Wedderburn | OREGON | 1 | 1992 |
| Ozette | WASHINGTON | 1 | 1986 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.