Species · Vermont · BBS 2025 Release · 1966–2024
Chestnut-sided Warbler Population Trend in Vermont
Chestnut-sided Warbler in Vermont has increased: up 42% on the route-weighted index since 1968.
+42%Since 1968
26Routes In State
58Years
Notable Chestnut-sided Warbler Trends in Vermont
No notable trend signals for Chestnut-sided Warbler in Vermont. See the full index history below.
Chestnut-sided Warbler Population Forecast in Vermont
If the recent trend holds, Chestnut-sided Warbler in Vermont is projected to fall about 27% by 2029 — from 14 in 2024 to a central estimate of 10.0 (95% range 6.1–14). A 5-year backtest shows a typical error of ±26%, with 40% of held-out values landing inside the 95% band.
-27%Change by 2029
10.0Projected 2029 index
6.1–1495% range
±26%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 10 | 6.1 | 14 |
| 2026 | 10 | 6.1 | 14 |
| 2027 | 10.0 | 6.1 | 14 |
| 2028 | 10.0 | 6.1 | 14 |
| 2029 | 10.0 | 6.1 | 14 |
Chestnut-sided Warbler Survey Routes in Vermont
| Stowe | 38 | 2024 | 1988 |
| East Calais | 22 | 2024 | 1966 |
| S Wallingfrd | 19 | 2022 | 1966 |
| Hardwick | 19 | 2024 | 1966 |
| Waterville | 19 | 1980 | 1968 |
| Shaftsbury | 18 | 2024 | 1966 |
| Fletcher | 18 | 2024 | 1971 |
| Stratton | 17 | 2024 | 1966 |
| Marlboro | 15 | 2024 | 1966 |
| Gaysville | 15 | 2021 | 1966 |
| W Rutland | 15 | 2024 | 1966 |
| Middlesex | 15 | 2024 | 1968 |
| S Reading | 14 | 2024 | 1966 |
| Northfld Fls | 12 | 2021 | 1980 |
| Landgrove | 10 | 2024 | 1966 |
| Post Mills | 10 | 2024 | 1966 |
| St Johnsbury | 10 | 2024 | 1970 |
| East Haven | 10 | 2024 | 1966 |
| Newbury 2 | 9 | 2023 | 2005 |
| Greensboro | 8 | 2024 | 1967 |
| North Pownal | 6 | 2024 | 1966 |
| Newbury | 3 | 2004 | 1986 |
| Hinesburg | 3 | 1994 | 1966 |
| Bristol | 3 | 2018 | 1995 |
| Colchester | 1 | 2024 | 1986 |
Chestnut-sided Warbler Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.