Species · BCR 30 · BBS 2025 Release · 1966–2024
Canada Warbler In New England / Mid-Atlantic Coast
Canada Warbler in New England / Mid-Atlantic Coast has collapsed: down 90% on the route-weighted index since 1968.
-90%Since 1968
34Routes In Region
56Years
Notable Signals
long arc declinecomputed index
Canada Warbler has collapsed in New England / Mid-Atlantic Coast: down 90% on the route-weighted index since 1968.
Forecast
If the recent trend holds, Canada Warbler in New England / Mid-Atlantic Coast is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.09). A 5-year backtest shows a typical error of ±241.4%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2029
0.00Projected 2029 index
0.00–0.0995% range
±241.4%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.00 | 0.00 | 0.09 |
| 2026 | 0.00 | 0.00 | 0.09 |
| 2027 | 0.00 | 0.00 | 0.09 |
| 2028 | 0.00 | 0.00 | 0.09 |
| 2029 | 0.00 | 0.00 | 0.09 |
Routes In New England / Mid-Atlantic Coast
| Warren | CONNECTICUT | 4 | 2011 |
| Buckingham | CONNECTICUT | 3 | 1972 |
| Princeton | MASSACHUSETTS | 2 | 1976 |
| Epsom | NEW-HAMPSHIRE | 2 | 2008 |
| Huntington | NEW-YORK | 2 | 1995 |
| Mystic | CONNECTICUT | 1 | 1983 |
| E Hartland | CONNECTICUT | 1 | 1990 |
| Uncasville | CONNECTICUT | 1 | 1977 |
| Woodstock | CONNECTICUT | 1 | 2004 |
| Willimantic | CONNECTICUT | 1 | 2000 |
| No Woodbury | CONNECTICUT | 1 | 1985 |
| Sherman | CONNECTICUT | 1 | 2008 |
| Danbury | CONNECTICUT | 1 | 1972 |
| Long Hill | CONNECTICUT | 1 | 1982 |
| Mid Haddam | CONNECTICUT | 1 | 2014 |
| Granby | CONNECTICUT | 1 | 2023 |
| Kittery Pt | MAINE | 1 | 2019 |
| Marion | MASSACHUSETTS | 1 | 1992 |
| Newburyport | MASSACHUSETTS | 1 | 1968 |
| Belchertown | MASSACHUSETTS | 1 | 2024 |
| Warren | MASSACHUSETTS | 1 | 1998 |
| S Barre | MASSACHUSETTS | 1 | 2005 |
| Holden | MASSACHUSETTS | 1 | 1983 |
| Ware River | MASSACHUSETTS | 1 | 2022 |
| Brentwood | NEW-HAMPSHIRE | 1 | 1990 |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.