Species · Alaska · BBS 2025 Release · 1966–2024
Pine Grosbeak Population Trend in Alaska
Pine Grosbeak in Alaska has fallen sharply: down 61% on the route-weighted index since 1978.
-61%Since 1978
80Routes In State
45Years
Notable Pine Grosbeak Trends in Alaska
long arc declinecomputed index
Pine Grosbeak has fallen sharply in Alaska: down 61% on the route-weighted index since 1978.
Pine Grosbeak Population Forecast in Alaska
If the recent trend holds, Pine Grosbeak in Alaska is projected to fall about 15% by 2029 — from 0.55 in 2024 to a central estimate of 0.47 (95% range 0.00–1.2). A 5-year backtest shows a typical error of ±23.5%, with 100% of held-out values landing inside the 95% band.
-15%Change by 2029
0.47Projected 2029 index
0.00–1.295% range
±23.5%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.52 | 0.00 | 1.3 |
| 2026 | 0.50 | 0.00 | 1.2 |
| 2027 | 0.49 | 0.00 | 1.2 |
| 2028 | 0.48 | 0.00 | 1.2 |
| 2029 | 0.47 | 0.00 | 1.2 |
Pine Grosbeak Survey Routes in Alaska
| Alpenglow (Short) | 66 | 1996 | 1996 |
| Juneau | 11 | 2006 | 2006 |
| Kodiak 2 | 10 | 2024 | 1985 |
| Copper River | 10 | 2011 | 1994 |
| Unalakleet River | 8 | 2024 | 2008 |
| Hope | 7 | 2024 | 1985 |
| Nabesna Road | 7 | 1989 | 1989 |
| Moose Pass | 6 | 1985 | 1983 |
| Seven Lakes | 5 | 2023 | 1986 |
| Chistochina | 4 | 2023 | 1990 |
| Northway | 4 | 2016 | 1989 |
| Swan Lake Rd | 4 | 2023 | 1982 |
| Sitka (Short) | 4 | 1984 | 1984 |
| Kanuti Canyn | 4 | 2004 | 2002 |
| Anvik River | 4 | 2023 | 2008 |
| Gweek River | 4 | 2002 | 1999 |
| Sourdough | 3 | 2021 | 1989 |
| Bear Creek | 3 | 1988 | 1987 |
| Yakutat | 3 | 2023 | 1993 |
| Chiniak | 3 | 2024 | 1985 |
| Mitkof Isle | 3 | 1994 | 1988 |
| Nicholai Sl | 3 | 2002 | 1993 |
| Kobuk River (Short) | 3 | 1992 | 1991 |
| Kenai Lake (Short) | 3 | 1984 | 1984 |
| Paxson Lake | 3 | 1995 | 1995 |
Pine Grosbeak Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.