Species · Maine · BBS 2025 Release · 1966–2024
Tennessee Warbler Population Trend in Maine
Tennessee Warbler in Maine has collapsed: down 87% on the route-weighted index since 1971.
-87%Since 1971
60Routes In State
47Years
Notable Tennessee Warbler Trends in Maine
long arc declinecomputed index
Tennessee Warbler has collapsed in Maine: down 87% on the route-weighted index since 1971.
Tennessee Warbler Population Forecast in Maine
If the recent trend holds, Tennessee Warbler in Maine is projected to fall about 100% by 2027 — from 0.10 in 2022 to a central estimate of 0.00 (95% range 0.00–1.1). A 5-year backtest shows a typical error of ±150.3%, with 100% of held-out values landing inside the 95% band.
-100%Change by 2027
0.00Projected 2027 index
0.00–1.195% range
±150.3%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2023 | 0.00 | 0.00 | 1.1 |
| 2024 | 0.00 | 0.00 | 1.1 |
| 2025 | 0.00 | 0.00 | 1.1 |
| 2026 | 0.00 | 0.00 | 1.1 |
| 2027 | 0.00 | 0.00 | 1.1 |
Tennessee Warbler Survey Routes in Maine
| Northfield | 18 | 1981 | 1976 |
| Winn | 9 | 1997 | 1978 |
| Baxter | 7 | 1984 | 1977 |
| Seboomook Lk | 7 | 1993 | 1978 |
| Waite | 6 | 1977 | 1977 |
| Clayton Lake 2 | 4 | 2011 | 2010 |
| Topsfield | 3 | 1992 | 1978 |
| Clayton Lake | 3 | 2008 | 1977 |
| Washburn | 3 | 1993 | 1990 |
| Otisfield Gr | 2 | 1976 | 1976 |
| Manchester | 2 | 1974 | 1971 |
| Benton | 2 | 1977 | 1971 |
| Carrying Pl | 2 | 1993 | 1980 |
| Cambridge | 2 | 1983 | 1977 |
| Boundary | 2 | 2004 | 2004 |
| Ft Fairfield | 2 | 1998 | 1994 |
| St David | 2 | 1992 | 1982 |
| Weeks Brook | 2 | 2015 | 1997 |
| Baker Lake | 2 | 2004 | 1994 |
| Heron Lake | 2 | 1999 | 1983 |
| Northfield 2 | 1 | 2022 | 1992 |
| Westbrook | 1 | 1989 | 1987 |
| Biddeford | 1 | 1979 | 1978 |
| Kittery Pt | 1 | 1968 | 1968 |
| Newcastle | 1 | 1979 | 1979 |
Tennessee Warbler Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.