Species · South Carolina · BBS 2025 Release · 1966–2024
Anhinga Population Trend in South Carolina
Anhinga in South Carolina has surged: up 128% on the route-weighted index since 1976.
+128%Since 1976
14Routes In State
31Years
Notable Anhinga Trends in South Carolina
long arc increasecomputed index
Anhinga has surged in South Carolina: up 128% on the route-weighted index since 1976.
Anhinga Population Forecast in South Carolina
If the recent trend holds, Anhinga in South Carolina is projected to rise about 172% by 2029 — from 0.10 in 2024 to a central estimate of 0.26 (95% range 0.00–0.55). A 5-year backtest shows a typical error of ±78.4%, with 100% of held-out values landing inside the 95% band.
+172%Change by 2029
0.26Projected 2029 index
0.00–0.5595% range
±78.4%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.24 | 0.00 | 0.54 |
| 2026 | 0.25 | 0.00 | 0.54 |
| 2027 | 0.25 | 0.00 | 0.54 |
| 2028 | 0.25 | 0.00 | 0.55 |
| 2029 | 0.26 | 0.00 | 0.55 |
Anhinga Survey Routes in South Carolina
| Bennettsville | 21 | 2017 | 1999 |
| Nixville | 3 | 2009 | 2009 |
| Kiawah Island | 2 | 2024 | 2000 |
| Walterboro | 2 | 1975 | 1975 |
| Jamestown | 1 | 2004 | 2004 |
| Hardeeville | 1 | 2023 | 1973 |
| Rome | 1 | 2023 | 1980 |
| Holly Hill | 1 | 2021 | 1988 |
| Adams Run | 1 | 2023 | 1996 |
| Red Bluff | 1 | 2023 | 2018 |
| Bishopville | 1 | 2023 | 2007 |
| Olar | 1 | 2018 | 2018 |
| Pinewood | 1 | 2017 | 1998 |
| Dale | 1 | 2023 | 1998 |
Anhinga Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.