Species · Colorado · BBS 2025 Release · 1966–2024
Chihuahuan Raven Population Trend in Colorado
Chihuahuan Raven in Colorado has surged: up 285% on the route-weighted index since 1974.
+285%Since 1974
20Routes In State
47Years
Notable Chihuahuan Raven Trends in Colorado
long arc increasecomputed index
Chihuahuan Raven has surged in Colorado: up 285% on the route-weighted index since 1974.
Chihuahuan Raven Population Forecast in Colorado
If the recent trend holds, Chihuahuan Raven in Colorado is projected to rise about 13% by 2029 — from 0.43 in 2024 to a central estimate of 0.49 (95% range 0.00–1.1). A 5-year backtest shows a typical error of ±37.3%, with 100% of held-out values landing inside the 95% band.
+13%Change by 2029
0.49Projected 2029 index
0.00–1.195% range
±37.3%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.47 | 0.00 | 1.1 |
| 2026 | 0.47 | 0.00 | 1.1 |
| 2027 | 0.48 | 0.00 | 1.1 |
| 2028 | 0.48 | 0.00 | 1.1 |
| 2029 | 0.49 | 0.00 | 1.1 |
Chihuahuan Raven Survey Routes in Colorado
| Campo | 20 | 2019 | 1988 |
| Pritchett | 15 | 2024 | 1999 |
| Gilpin | 14 | 2024 | 1972 |
| Timpas | 10 | 2019 | 1995 |
| Edler | 9 | 2023 | 1992 |
| Doyle Bridge 2 | 7 | 2022 | 2013 |
| Crowley | 7 | 2023 | 2003 |
| Lamar | 6 | 2024 | 1988 |
| Villegreen | 6 | 2019 | 1988 |
| Two Buttes | 5 | 2015 | 1973 |
| Ninaview | 5 | 2012 | 1996 |
| Trinchera | 3 | 2021 | 2018 |
| Sheridan Lak | 3 | 2013 | 2013 |
| Haswell | 2 | 2024 | 1995 |
| Neegrande | 2 | 2023 | 2023 |
| Gardner | 2 | 2024 | 1998 |
| Cone Mtn | 2 | 2024 | 1989 |
| Rush | 1 | 2024 | 1983 |
| Cheyenne | 1 | 1998 | 1998 |
| Karval | 1 | 2014 | 2014 |
Chihuahuan Raven Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.