Species · Alaska · BBS 2025 Release · 1966–2024
Pelagic Cormorant Population Trend in Alaska
Pelagic Cormorant in Alaska has collapsed: down 77% on the route-weighted index since 1985.
-77%Since 1985
9Routes In State
31Years
Notable Pelagic Cormorant Trends in Alaska
long arc declinecomputed index
Pelagic Cormorant has collapsed in Alaska: down 77% on the route-weighted index since 1985.
Pelagic Cormorant Population Forecast in Alaska
If the recent trend holds, Pelagic Cormorant in Alaska is projected to fall about 100% by 2029 — from 0.07 in 2024 to a central estimate of 0.00 (95% range 0.00–0.28). A 5-year backtest shows a typical error of ±181.5%, with 100% of held-out values landing inside the 95% band.
-100%Change by 2029
0.00Projected 2029 index
0.00–0.2895% range
±181.5%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.00 | 0.00 | 0.28 |
| 2026 | 0.00 | 0.00 | 0.28 |
| 2027 | 0.00 | 0.00 | 0.28 |
| 2028 | 0.00 | 0.00 | 0.28 |
| 2029 | 0.00 | 0.00 | 0.28 |
Pelagic Cormorant Survey Routes in Alaska
Pelagic Cormorant Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.