Species · Colorado · BBS 2025 Release · 1966–2024
Prairie Falcon Population Trend in Colorado
Prairie Falcon in Colorado has fallen sharply: down 67% on the route-weighted index since 1975.
-67%Since 1975
85Routes In State
48Years
Notable Prairie Falcon Trends in Colorado
long arc declinecomputed index
Prairie Falcon has fallen sharply in Colorado: down 67% on the route-weighted index since 1975.
Prairie Falcon Population Forecast in Colorado
If the recent trend holds, Prairie Falcon in Colorado is projected to stay roughly flat through 2029, near 0.07 (95% range 0.00–0.15). A 5-year backtest shows a typical error of ±163.9%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2029
0.07Projected 2029 index
0.00–0.1595% range
±163.9%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.07 | 0.00 | 0.15 |
| 2026 | 0.07 | 0.00 | 0.15 |
| 2027 | 0.07 | 0.00 | 0.15 |
| 2028 | 0.07 | 0.00 | 0.15 |
| 2029 | 0.07 | 0.00 | 0.15 |
Prairie Falcon Survey Routes in Colorado
| Fleming | 7 | 2003 | 1981 |
| Wray Gulch | 3 | 2005 | 1988 |
| Briggsdale | 2 | 2018 | 1986 |
| Moffat | 2 | 2021 | 1980 |
| Blanca | 2 | 1981 | 1981 |
| Alamosa | 2 | 2015 | 2011 |
| Piedra | 2 | 2012 | 2012 |
| Ragged Mtn. | 2 | 2011 | 2011 |
| Ellicott | 2 | 2017 | 1995 |
| Maybell | 1 | 2022 | 2022 |
| Yampa | 1 | 1997 | 1987 |
| Harmony | 1 | 2010 | 1992 |
| Pinneo | 1 | 1990 | 1990 |
| Buford | 1 | 2012 | 1978 |
| Aspen | 1 | 2018 | 2018 |
| Kiowa | 1 | 2013 | 1991 |
| Last Chance | 1 | 2009 | 1980 |
| Abarr | 1 | 2010 | 1975 |
| Delta | 1 | 1974 | 1974 |
| Colona | 1 | 2002 | 2002 |
| Rush | 1 | 2019 | 1999 |
| Boyero | 1 | 2015 | 2014 |
| Mica Butte | 1 | 1982 | 1973 |
| Gilpin | 1 | 2017 | 1975 |
| Two Buttes | 1 | 2011 | 1990 |
Prairie Falcon Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.