Species · Louisiana · BBS 2025 Release · 1966–2024
Worm-eating Warbler Population Trend in Louisiana
Worm-eating Warbler in Louisiana has surged: up 227% on the route-weighted index since 1969.
+227%Since 1969
30Routes In State
49Years
Notable Worm-eating Warbler Trends in Louisiana
long arc increasecomputed index
Worm-eating Warbler has surged in Louisiana: up 227% on the route-weighted index since 1969.
Worm-eating Warbler Population Forecast in Louisiana
If the recent trend holds, Worm-eating Warbler in Louisiana is projected to fall about 57% by 2029 — from 0.41 in 2024 to a central estimate of 0.18 (95% range 0.00–0.41). A 5-year backtest shows a typical error of ±56%, with 40% of held-out values landing inside the 95% band.
-57%Change by 2029
0.18Projected 2029 index
0.00–0.4195% range
±56%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.17 | 0.00 | 0.40 |
| 2026 | 0.18 | 0.00 | 0.40 |
| 2027 | 0.18 | 0.00 | 0.40 |
| 2028 | 0.18 | 0.00 | 0.41 |
| 2029 | 0.18 | 0.00 | 0.41 |
Worm-eating Warbler Survey Routes in Louisiana
| Enterprise | 5 | 2024 | 2008 |
| Chatham | 4 | 1971 | 1967 |
| Hargis | 3 | 2010 | 2005 |
| Norwood | 3 | 2024 | 2009 |
| Fort Jessup | 2 | 2021 | 1999 |
| Linville | 2 | 2024 | 1998 |
| Ivan | 2 | 2013 | 2006 |
| Easton | 2 | 1981 | 1980 |
| Goodwill | 2 | 2024 | 2021 |
| Mount Union | 2 | 2024 | 2021 |
| Haughton | 1 | 1991 | 1991 |
| Plettenberg | 1 | 2022 | 1973 |
| Hargis 2 | 1 | 2014 | 2013 |
| Clay | 1 | 2010 | 1968 |
| Franklinton | 1 | 2016 | 2016 |
| Greensburg | 1 | 2022 | 2022 |
| Trout | 1 | 2024 | 1994 |
| Many | 1 | 1991 | 1991 |
| Marion | 1 | 1996 | 1988 |
| Grayson | 1 | 2018 | 2009 |
| Evelyn | 1 | 2024 | 2012 |
| Flat Creek | 1 | 2015 | 1998 |
| Zwolle | 1 | 2023 | 1998 |
| Womack | 1 | 2022 | 2022 |
| Pine Prairie | 1 | 1996 | 1996 |
Worm-eating Warbler Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.