Species · Vermont · BBS 2025 Release · 1966–2024
Olive-sided Flycatcher Population Trend in Vermont
Olive-sided Flycatcher in Vermont has fallen sharply: down 75% on the route-weighted index since 1969.
-75%Since 1969
20Routes In State
48Years
Notable Olive-sided Flycatcher Trends in Vermont
long arc declinecomputed index
Olive-sided Flycatcher has fallen sharply in Vermont: down 75% on the route-weighted index since 1969.
Olive-sided Flycatcher Population Forecast in Vermont
If the recent trend holds, Olive-sided Flycatcher in Vermont is projected to fall about 100% by 2029 — from 0.17 in 2024 to a central estimate of 0.00 (95% range 0.00–0.22). A 5-year backtest shows a typical error of ±78.4%, with 100% of held-out values landing inside the 95% band.
-100%Change by 2029
0.00Projected 2029 index
0.00–0.2295% range
±78.4%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.01 | 0.00 | 0.23 |
| 2026 | 0.01 | 0.00 | 0.23 |
| 2027 | 0.00 | 0.00 | 0.22 |
| 2028 | 0.00 | 0.00 | 0.22 |
| 2029 | 0.00 | 0.00 | 0.22 |
Olive-sided Flycatcher Survey Routes in Vermont
| Waterville | 3 | 1979 | 1979 |
| Hardwick | 2 | 2016 | 1968 |
| Marlboro | 1 | 1995 | 1976 |
| North Pownal | 1 | 1969 | 1969 |
| Stratton | 1 | 1990 | 1968 |
| Landgrove | 1 | 2024 | 1967 |
| S Reading | 1 | 1979 | 1968 |
| Post Mills | 1 | 1976 | 1975 |
| Shaftsbury | 1 | 1977 | 1976 |
| W Rutland | 1 | 1977 | 1977 |
| St Johnsbury | 1 | 2010 | 1970 |
| East Haven | 1 | 1999 | 1967 |
| Northfld Fls | 1 | 2021 | 1986 |
| Middlesex | 1 | 2018 | 1969 |
| East Calais | 1 | 2024 | 1968 |
| Newbury | 1 | 1989 | 1987 |
| Greensboro | 1 | 2004 | 1967 |
| Hinesburg | 1 | 1982 | 1982 |
| Newbury 2 | 1 | 2012 | 2012 |
| Stowe | 1 | 2024 | 1992 |
Olive-sided Flycatcher Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.