Species · BCR 16 · BBS 2025 Release · 1966–2024
Black-crowned Night Heron In Southern Rockies / Colorado Plateau
Black-crowned Night Heron in Southern Rockies / Colorado Plateau has collapsed: down 93% on the route-weighted index since 1970.
-93%Since 1970
26Routes In Region
45Years
Notable Signals
long arc declinecomputed index
Black-crowned Night Heron has collapsed in Southern Rockies / Colorado Plateau: down 93% on the route-weighted index since 1970.
Forecast
If the recent trend holds, Black-crowned Night Heron in Southern Rockies / Colorado Plateau is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.16). A 5-year backtest shows a typical error of ±194.5%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2029
0.00Projected 2029 index
0.00–0.1695% range
±194.5%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.00 | 0.00 | 0.16 |
| 2026 | 0.00 | 0.00 | 0.16 |
| 2027 | 0.00 | 0.00 | 0.16 |
| 2028 | 0.00 | 0.00 | 0.16 |
| 2029 | 0.00 | 0.00 | 0.16 |
Routes In Southern Rockies / Colorado Plateau
| Rio Grnds Rs | COLORADO | 12 | 1999 |
| Cleveland | UTAH | 4 | 2014 |
| Buford | COLORADO | 3 | 1984 |
| San Luis | COLORADO | 2 | 2009 |
| Mosca | COLORADO | 2 | 2008 |
| Powderhorn | COLORADO | 2 | 1999 |
| Valencia | NEW-MEXICO | 2 | 1996 |
| Stinking Lk. | NEW-MEXICO | 2 | 1996 |
| Moab | UTAH | 2 | 2012 |
| Hunt | ARIZONA | 1 | 1999 |
| Toroweap | ARIZONA | 1 | 2017 |
| Harmony | COLORADO | 1 | 1995 |
| Moffat | COLORADO | 1 | 1979 |
| Dolores | COLORADO | 1 | 1985 |
| Blanca | COLORADO | 1 | 1980 |
| Walden | COLORADO | 1 | 2019 |
| Pinos Creek | COLORADO | 1 | 1988 |
| Alamosa | COLORADO | 1 | 2024 |
| Groundhog Rs | COLORADO | 1 | 1994 |
| Lake City 2 | COLORADO | 1 | 2018 |
| Moon Pass | COLORADO | 1 | 2003 |
| Gallinas | NEW-MEXICO | 1 | 2005 |
| Angel Fire 2 | NEW-MEXICO | 1 | 2024 |
| Fish Lake Nf | UTAH | 1 | 1992 |
| Bicknell | UTAH | 1 | 2002 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.