Species · Alabama · BBS 2025 Release · 1966–2024
Clapper Rail Population Trend in Alabama
Clapper Rail in Alabama has fallen sharply: down 69% on the route-weighted index since 1968.
-69%Since 1968
5Routes In State
50Years
Notable Clapper Rail Trends in Alabama
long arc declinecomputed index
Clapper Rail has fallen sharply in Alabama: down 69% on the route-weighted index since 1968.
Clapper Rail Population Forecast in Alabama
If the recent trend holds, Clapper Rail in Alabama is projected to fall about 89% by 2024 — from 0.05 in 2019 to a central estimate of 0.01 (95% range 0.00–0.15). A 5-year backtest shows a typical error of ±47.3%, with 100% of held-out values landing inside the 95% band.
-89%Change by 2024
0.01Projected 2024 index
0.00–0.1595% range
±47.3%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2020 | 0.02 | 0.00 | 0.16 |
| 2021 | 0.01 | 0.00 | 0.16 |
| 2022 | 0.01 | 0.00 | 0.15 |
| 2023 | 0.01 | 0.00 | 0.15 |
| 2024 | 0.01 | 0.00 | 0.15 |
Clapper Rail Survey Routes in Alabama
| Dauphin Is 2 | 4 | 2019 | 1991 |
| Dauphin Is | 3 | 1990 | 1966 |
| Alabama Pt | 1 | 1992 | 1973 |
| Alabama Pt 2 | 1 | 2011 | 2008 |
| Chacaloochee Bay | 1 | 2016 | 2014 |
Clapper Rail Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.