Species · Colorado · BBS 2025 Release · 1966–2024
Bobolink Population Trend in Colorado
Bobolink in Colorado has collapsed: down 80% on the route-weighted index since 1975.
-80%Since 1975
9Routes In State
42Years
Notable Bobolink Trends in Colorado
long arc declinecomputed index
Bobolink has collapsed in Colorado: down 80% on the route-weighted index since 1975.
Bobolink Population Forecast in Colorado
If the recent trend holds, Bobolink in Colorado is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.09). A 5-year backtest shows a typical error of ±146.5%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2029
0.00Projected 2029 index
0.00–0.0995% range
±146.5%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.00 | 0.00 | 0.09 |
| 2026 | 0.00 | 0.00 | 0.09 |
| 2027 | 0.00 | 0.00 | 0.09 |
| 2028 | 0.00 | 0.00 | 0.09 |
| 2029 | 0.00 | 0.00 | 0.09 |
Bobolink Survey Routes in Colorado
| Hudson | 3 | 2022 | 2009 |
| Maybell | 2 | 2017 | 2016 |
| Yampa | 2 | 1987 | 1976 |
| Browns Park | 2 | 1995 | 1995 |
| Fort Morgan | 2 | 2002 | 1999 |
| Buford | 1 | 2024 | 1973 |
| Castleton | 1 | 1991 | 1991 |
| Julesburg | 1 | 2017 | 2017 |
| Neegrande | 1 | 1994 | 1994 |
Bobolink Population Trend in Other States
californiaconnecticutidahoillinoisindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooregonpennsylvaniarhode-islandsouth-dakotautahvermontvirginiawashingtonwest-virginiawisconsinwyoming
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.