Species · BCR 17 · BBS 2025 Release · 1966–2024
Black-crowned Night Heron In Badlands and Prairies
Black-crowned Night Heron in Badlands and Prairies has collapsed: down 78% on the route-weighted index since 1969.
-78%Since 1969
14Routes In Region
22Years
Notable Signals
long arc declinecomputed index
Black-crowned Night Heron has collapsed in Badlands and Prairies: down 78% on the route-weighted index since 1969.
Forecast
If the recent trend holds, Black-crowned Night Heron in Badlands and Prairies is projected to stay roughly flat through 2019, near 0.00 (95% range 0.00–0.04). A 5-year backtest shows a typical error of ±167.9%, with 80% of held-out values landing inside the 95% band.
n/aChange by 2019
0.00Projected 2019 index
0.00–0.0495% range
±167.9%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2015 | 0.00 | 0.00 | 0.04 |
| 2016 | 0.00 | 0.00 | 0.04 |
| 2017 | 0.00 | 0.00 | 0.04 |
| 2018 | 0.00 | 0.00 | 0.04 |
| 2019 | 0.00 | 0.00 | 0.04 |
Routes In Badlands and Prairies
| Dwyer | WYOMING | 2 | 1992 |
| Highwood | MONTANA | 1 | 1993 |
| Roy | MONTANA | 1 | 1996 |
| Two Dot | MONTANA | 1 | 1996 |
| Shawmut | MONTANA | 1 | 1996 |
| Ft Yates | NORTH-DAKOTA | 1 | 1989 |
| Dunn Center | NORTH-DAKOTA | 1 | 1982 |
| Tobacco | NORTH-DAKOTA | 1 | 1979 |
| Bowman | NORTH-DAKOTA | 1 | 1986 |
| Bentley | NORTH-DAKOTA | 1 | 2013 |
| Chamberlain | SOUTH-DAKOTA | 1 | 1972 |
| Ft Thompson | SOUTH-DAKOTA | 1 | 1998 |
| Ottumwa | SOUTH-DAKOTA | 1 | 1967 |
| Lacreek | SOUTH-DAKOTA | 1 | 2014 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.