Species · Texas · BBS 2025 Release · 1966–2024
Least Bittern Population Trend in Texas
Least Bittern in Texas has fallen sharply: down 51% on the route-weighted index since 1971.
-51%Since 1971
17Routes In State
36Years
Notable Least Bittern Trends in Texas
No notable trend signals for Least Bittern in Texas. See the full index history below.
Least Bittern Population Forecast in Texas
If the recent trend holds, Least Bittern in Texas is projected to stay roughly flat through 2029, near 0.01 (95% range 0.00–0.05). A 5-year backtest shows a typical error of ±72.4%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2029
0.01Projected 2029 index
0.00–0.0595% range
±72.4%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.01 | 0.00 | 0.05 |
| 2026 | 0.01 | 0.00 | 0.05 |
| 2027 | 0.01 | 0.00 | 0.05 |
| 2028 | 0.01 | 0.00 | 0.05 |
| 2029 | 0.01 | 0.00 | 0.05 |
Least Bittern Survey Routes in Texas
| L. Atascosa Nwr | 2 | 2023 | 2023 |
| Town Bluff | 1 | 1968 | 1968 |
| Lag Atascosa | 1 | 1994 | 1994 |
| Raymondville | 1 | 2006 | 2006 |
| Bayside 2 | 1 | 1997 | 1997 |
| Indianola | 1 | 2023 | 1994 |
| Hobson | 1 | 1999 | 1999 |
| Weinert | 1 | 1990 | 1990 |
| Chinquapin | 1 | 2024 | 2009 |
| Oyster Lake | 1 | 2019 | 1997 |
| Winnie | 1 | 2018 | 1967 |
| Stowell | 1 | 2010 | 1968 |
| Danbury | 1 | 1989 | 1987 |
| Katy | 1 | 2013 | 2013 |
| Moon Lake | 1 | 2002 | 2002 |
| Rock Island | 1 | 2024 | 1978 |
| Port Acres | 1 | 2008 | 1998 |
Least Bittern Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.