Species · South Carolina · BBS 2025 Release · 1966–2024
Common Gallinule Population Trend in South Carolina
Common Gallinule in South Carolina has surged: up 175% on the route-weighted index since 2002.
+175%Since 2002
5Routes In State
18Years
Notable Common Gallinule Trends in South Carolina
long arc increasecomputed index
Common Gallinule has surged in South Carolina: up 175% on the route-weighted index since 2002.
Common Gallinule Population Forecast in South Carolina
If the recent trend holds, Common Gallinule in South Carolina is projected to stay roughly flat through 2029, near 0.20 (95% range 0.00–0.48). A 5-year backtest shows a typical error of ±93.8%, with 100% of held-out values landing inside the 95% band.
+5%Change by 2029
0.20Projected 2029 index
0.00–0.4895% range
±93.8%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.19 | 0.00 | 0.47 |
| 2026 | 0.19 | 0.00 | 0.47 |
| 2027 | 0.20 | 0.00 | 0.48 |
| 2028 | 0.20 | 0.00 | 0.48 |
| 2029 | 0.20 | 0.00 | 0.48 |
Common Gallinule Survey Routes in South Carolina
| Dale | 3 | 2024 | 2019 |
| Hardeeville | 1 | 2006 | 2006 |
| Kiawah Island | 1 | 2024 | 1998 |
| Walterboro | 1 | 1977 | 1977 |
| Bennettsville | 1 | 2002 | 2002 |
Common Gallinule Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.