Species · Oklahoma · BBS 2025 Release · 1966–2024
Black-crowned Night Heron Population Trend in Oklahoma
Black-crowned Night Heron in Oklahoma has fallen sharply: down 67% on the route-weighted index since 1969.
-67%Since 1969
17Routes In State
27Years
Notable Black-crowned Night Heron Trends in Oklahoma
long arc declinecomputed index
Black-crowned Night Heron has fallen sharply in Oklahoma: down 67% on the route-weighted index since 1969.
Black-crowned Night Heron Population Forecast in Oklahoma
If the recent trend holds, Black-crowned Night Heron in Oklahoma is projected to fall about 70% by 2026 — from 0.05 in 2021 to a central estimate of 0.02 (95% range 0.00–0.13). A 5-year backtest shows a typical error of ±73.5%, with 100% of held-out values landing inside the 95% band.
-70%Change by 2026
0.02Projected 2026 index
0.00–0.1395% range
±73.5%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2022 | 0.02 | 0.00 | 0.14 |
| 2023 | 0.02 | 0.00 | 0.13 |
| 2024 | 0.02 | 0.00 | 0.13 |
| 2025 | 0.02 | 0.00 | 0.13 |
| 2026 | 0.02 | 0.00 | 0.13 |
Black-crowned Night Heron Survey Routes in Oklahoma
| Holdenville | 2 | 1985 | 1968 |
| Beggs | 2 | 1968 | 1968 |
| Erick | 2 | 1990 | 1988 |
| Tatums | 2 | 2021 | 1993 |
| Rosston | 1 | 1988 | 1988 |
| Blanco | 1 | 1974 | 1974 |
| Beaver | 1 | 1988 | 1982 |
| Jet | 1 | 2016 | 2001 |
| Hooker | 1 | 2000 | 1992 |
| Reed | 1 | 2016 | 2001 |
| Baron | 1 | 1981 | 1981 |
| Duncan | 1 | 1994 | 1991 |
| Indianola | 1 | 1996 | 1996 |
| Choctaw | 1 | 2005 | 1981 |
| Verden | 1 | 1970 | 1967 |
| Sickles | 1 | 1992 | 1992 |
| Tegarden | 1 | 1982 | 1974 |
Black-crowned Night Heron Population Trend in Other States
alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.