Species · West Virginia · BBS 2025 Release · 1966–2024
Bank Swallow Population Trend in West Virginia
Bank Swallow in West Virginia has collapsed: down 97% on the route-weighted index since 1976.
-97%Since 1976
16Routes In State
22Years
Notable Bank Swallow Trends in West Virginia
long arc declinecomputed index
Bank Swallow has collapsed in West Virginia: down 97% on the route-weighted index since 1976.
Bank Swallow Population Forecast in West Virginia
If the recent trend holds, Bank Swallow in West Virginia is projected to stay roughly flat through 2009, near 0.00 (95% range 0.00–1.7). A 5-year backtest shows a typical error of ±2510.9%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2009
0.00Projected 2009 index
0.00–1.795% range
±2510.9%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2005 | 0.00 | 0.00 | 1.7 |
| 2006 | 0.00 | 0.00 | 1.7 |
| 2007 | 0.00 | 0.00 | 1.7 |
| 2008 | 0.00 | 0.00 | 1.7 |
| 2009 | 0.00 | 0.00 | 1.7 |
Bank Swallow Survey Routes in West Virginia
| Green Bank | 17 | 1997 | 1997 |
| Hix | 10 | 1982 | 1982 |
| Sleepy Creek | 10 | 1980 | 1967 |
| Martinsburg | 8 | 1995 | 1967 |
| Clear Creek | 6 | 1995 | 1995 |
| Meadowville | 5 | 1984 | 1984 |
| Clinton | 4 | 2000 | 1967 |
| Three Forks | 3 | 1994 | 1994 |
| Cedarville | 3 | 1987 | 1987 |
| Hubbardstown | 2 | 1990 | 1981 |
| Dailey | 1 | 1992 | 1992 |
| Slate | 1 | 2002 | 1989 |
| Washburn | 1 | 1986 | 1983 |
| Welch | 1 | 2004 | 2004 |
| Berryburg | 1 | 1978 | 1978 |
| Valley Head | 1 | 1983 | 1983 |
Bank Swallow Population Trend in Other States
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Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.