Species · Louisiana · BBS 2025 Release · 1966–2024
Yellow-crowned Night Heron Population Trend in Louisiana
Yellow-crowned Night Heron in Louisiana has surged: up 124% on the route-weighted index since 1969.
+124%Since 1969
78Routes In State
57Years
Notable Yellow-crowned Night Heron Trends in Louisiana
long arc increasecomputed index
Yellow-crowned Night Heron has surged in Louisiana: up 124% on the route-weighted index since 1969.
Yellow-crowned Night Heron Population Forecast in Louisiana
If the recent trend holds, Yellow-crowned Night Heron in Louisiana is projected to stay roughly flat through 2029, near 3.5 (95% range 0.00–8.2). A 5-year backtest shows a typical error of ±138.7%, with 100% of held-out values landing inside the 95% band.
-6%Change by 2029
3.5Projected 2029 index
0.00–8.295% range
±138.7%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 3.5 | 0.00 | 8.2 |
| 2026 | 3.5 | 0.00 | 8.2 |
| 2027 | 3.5 | 0.00 | 8.2 |
| 2028 | 3.5 | 0.00 | 8.2 |
| 2029 | 3.5 | 0.00 | 8.2 |
Yellow-crowned Night Heron Survey Routes in Louisiana
| Ramah | 90 | 2024 | 1988 |
| Morgan City | 23 | 1986 | 1968 |
| Atchafalaya | 14 | 2024 | 1989 |
| Creole | 12 | 1980 | 1967 |
| Keystone | 12 | 2013 | 1971 |
| Kraemer | 9 | 2024 | 1997 |
| Forked Island | 9 | 2024 | 2016 |
| Esther | 8 | 2024 | 1989 |
| Junior | 7 | 1991 | 1987 |
| Maurice | 7 | 2024 | 1989 |
| Mer Rouge | 4 | 1985 | 1967 |
| Ville Platte | 4 | 2017 | 1988 |
| Carlisle | 3 | 1988 | 1987 |
| Lafitte | 3 | 1991 | 1967 |
| Shaw | 3 | 2024 | 1972 |
| Larose | 3 | 1990 | 1990 |
| Womack | 3 | 2024 | 2024 |
| Derry 2 | 3 | 2022 | 1995 |
| Sabine Nwr 2 | 3 | 2014 | 2012 |
| Woodlawn | 3 | 2021 | 2008 |
| Freetown | 2 | 2019 | 1978 |
| Bickham | 2 | 1993 | 1985 |
| Fishville | 2 | 2011 | 2011 |
| Cypress | 2 | 1981 | 1967 |
| Clay | 2 | 2001 | 1970 |
Yellow-crowned Night Heron Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.