Species · Colorado · BBS 2025 Release · 1966–2024
Pine Siskin Population Trend in Colorado
Pine Siskin in Colorado has held roughly steady: up 10% on the route-weighted index since 1970.
+10%Since 1970
94Routes In State
56Years
Notable Pine Siskin Trends in Colorado
No notable trend signals for Pine Siskin in Colorado. See the full index history below.
Pine Siskin Population Forecast in Colorado
If the recent trend holds, Pine Siskin in Colorado is projected to rise about 106% by 2029 — from 3.5 in 2024 to a central estimate of 7.1 (95% range 2.2–12). A 5-year backtest shows a typical error of ±115.5%, with 60% of held-out values landing inside the 95% band.
+106%Change by 2029
7.1Projected 2029 index
2.2–1295% range
±115.5%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 7.0 | 2.0 | 12 |
| 2026 | 7.0 | 2.1 | 12 |
| 2027 | 7.0 | 2.1 | 12 |
| 2028 | 7.1 | 2.1 | 12 |
| 2029 | 7.1 | 2.2 | 12 |
Pine Siskin Survey Routes in Colorado
| Buffalo Park | 72 | 2023 | 1992 |
| Stillwater Pass | 61 | 2009 | 1998 |
| Lake City 2 | 36 | 2024 | 2016 |
| Ragged Mtn. | 30 | 2019 | 1994 |
| Pinos Creek | 27 | 1990 | 1988 |
| Castleton | 24 | 2024 | 1988 |
| Dunckley Pas | 21 | 2024 | 1992 |
| Weston Pass | 20 | 2000 | 1994 |
| Haycamp Mesa | 19 | 2024 | 1998 |
| Stillwater Pass 2 | 19 | 2024 | 2010 |
| Dolores Riv | 18 | 2024 | 1988 |
| Pinon | 17 | 2024 | 1992 |
| Heeney | 17 | 2019 | 2017 |
| Gold Hill | 16 | 2012 | 1998 |
| Lizard Head Pass | 16 | 2024 | 2001 |
| Lost Lake | 14 | 2024 | 1990 |
| Groundhog Rs | 14 | 2024 | 1992 |
| Powderhorn | 14 | 2023 | 1994 |
| Delta | 13 | 2021 | 1973 |
| Fox Creek | 13 | 2024 | 1993 |
| Rifle Falls | 13 | 2019 | 1998 |
| Owl Creek Pass | 12 | 2024 | 1998 |
| Red Cliff | 11 | 2024 | 1989 |
| Cokedale | 11 | 2019 | 1996 |
| Maybell | 10 | 1985 | 1985 |
Pine Siskin Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.