Species · Colorado · BBS 2025 Release · 1966–2024
Scaled Quail Population Trend in Colorado
Scaled Quail in Colorado has fallen sharply: down 65% on the route-weighted index since 1971.
-65%Since 1971
25Routes In State
53Years
Notable Scaled Quail Trends in Colorado
long arc declinecomputed index
Scaled Quail has fallen sharply in Colorado: down 65% on the route-weighted index since 1971.
Scaled Quail Population Forecast in Colorado
If the recent trend holds, Scaled Quail in Colorado is projected to rise about 79% by 2029 — from 0.21 in 2024 to a central estimate of 0.37 (95% range 0.00–0.98). A 5-year backtest shows a typical error of ±314.7%, with 100% of held-out values landing inside the 95% band.
+79%Change by 2029
0.37Projected 2029 index
0.00–0.9895% range
±314.7%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.38 | 0.00 | 0.99 |
| 2026 | 0.38 | 0.00 | 0.99 |
| 2027 | 0.37 | 0.00 | 0.98 |
| 2028 | 0.37 | 0.00 | 0.98 |
| 2029 | 0.37 | 0.00 | 0.98 |
Scaled Quail Survey Routes in Colorado
| Doyle Bridge | 15 | 1997 | 1992 |
| Haswell | 10 | 2024 | 2006 |
| Pritchett | 7 | 2017 | 1995 |
| Lamar | 4 | 2024 | 1975 |
| Mica Butte | 4 | 1986 | 1968 |
| Doyle Bridge 2 | 4 | 2019 | 1998 |
| Rush | 3 | 2022 | 1983 |
| Boyero | 3 | 2017 | 1981 |
| Gilpin | 3 | 2017 | 1970 |
| Edison | 3 | 2024 | 1994 |
| Crowley | 3 | 2024 | 1989 |
| Neegrande | 3 | 2018 | 1992 |
| Two Buttes | 2 | 2014 | 1980 |
| Campo | 2 | 2016 | 1988 |
| Edler | 2 | 2019 | 1992 |
| Cone Mtn | 2 | 2021 | 1994 |
| Cheyenne | 1 | 1992 | 1992 |
| Trinchera | 1 | 2021 | 1997 |
| Villegreen | 1 | 2017 | 1996 |
| Ellicott | 1 | 2022 | 1995 |
| Karval | 1 | 2019 | 1995 |
| Walsenburg | 1 | 2002 | 2002 |
| Timpas | 1 | 2015 | 1997 |
| Cokedale | 1 | 2006 | 2006 |
| Ninaview | 1 | 2023 | 1994 |
Scaled Quail Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.