Species · South Dakota · BBS 2025 Release · 1966–2024
Bullock's Oriole Population Trend in South Dakota
Bullock's Oriole in South Dakota has surged: up 394% on the route-weighted index since 1970.
+394%Since 1970
23Routes In State
44Years
Notable Bullock's Oriole Trends in South Dakota
long arc increasecomputed index
Bullock's Oriole has surged in South Dakota: up 394% on the route-weighted index since 1970.
Bullock's Oriole Population Forecast in South Dakota
If the recent trend holds, Bullock's Oriole in South Dakota is projected to fall about 27% by 2029 — from 0.23 in 2024 to a central estimate of 0.17 (95% range 0.04–0.29). A 5-year backtest shows a typical error of ±40.8%, with 80% of held-out values landing inside the 95% band.
-27%Change by 2029
0.17Projected 2029 index
0.04–0.2995% range
±40.8%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.16 | 0.03 | 0.28 |
| 2026 | 0.16 | 0.03 | 0.28 |
| 2027 | 0.16 | 0.04 | 0.29 |
| 2028 | 0.16 | 0.04 | 0.29 |
| 2029 | 0.17 | 0.04 | 0.29 |
Bullock's Oriole Survey Routes in South Dakota
| Wind Cave Np | 5 | 2024 | 2004 |
| Maurine | 3 | 2002 | 1972 |
| Lodgepole | 3 | 1990 | 1990 |
| Cottonwood | 2 | 2023 | 1993 |
| Indian | 2 | 2009 | 1997 |
| Volunteer | 2 | 2017 | 1977 |
| Harding | 2 | 2004 | 2003 |
| Marcus | 2 | 2010 | 2001 |
| Rockyford | 1 | 2018 | 1967 |
| S. Pioneer | 1 | 2006 | 1996 |
| Railroad Butte | 1 | 2002 | 2002 |
| French Creek | 1 | 2004 | 1997 |
| Promise | 1 | 2000 | 1971 |
| Owanka | 1 | 1998 | 1977 |
| Roubaix Lk | 1 | 1974 | 1974 |
| Custer | 1 | 2022 | 1986 |
| Cedar Pass | 1 | 2021 | 1969 |
| Reva | 1 | 1990 | 1989 |
| Isabel | 1 | 1990 | 1990 |
| Ardmore | 1 | 2005 | 1979 |
| Lacreek | 1 | 1997 | 1994 |
| Hazelrodt | 1 | 2021 | 2019 |
| Silver City | 1 | 1999 | 1999 |
Bullock's Oriole Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.