Species · Louisiana · BBS 2025 Release · 1966–2024
Caspian Tern Population Trend in Louisiana
Caspian Tern in Louisiana has edged down: down 17% on the route-weighted index since 1971.
-17%Since 1971
8Routes In State
16Years
Notable Caspian Tern Trends in Louisiana
No notable trend signals for Caspian Tern in Louisiana. See the full index history below.
Caspian Tern Survey Routes in Louisiana
| Ltl Chenier | 7 | 2014 | 2014 |
| Gran Chenier | 5 | 1973 | 1970 |
| Grand Isle | 4 | 2018 | 2010 |
| Berwick | 3 | 2011 | 1991 |
| Brousville | 2 | 2000 | 2000 |
| Kraemer | 1 | 2000 | 2000 |
| Creole | 1 | 1970 | 1967 |
| Sabine Nwr 2 | 1 | 2015 | 2013 |
Caspian Tern Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.