Species · Maine · BBS 2025 Release · 1966–2024
Olive-sided Flycatcher Population Trend in Maine
Olive-sided Flycatcher in Maine has collapsed: down 90% on the route-weighted index since 1969.
-90%Since 1969
68Routes In State
53Years
Notable Olive-sided Flycatcher Trends in Maine
long arc declinecomputed index
Olive-sided Flycatcher has collapsed in Maine: down 90% on the route-weighted index since 1969.
Olive-sided Flycatcher Population Forecast in Maine
If the recent trend holds, Olive-sided Flycatcher in Maine is projected to fall about 21% by 2029 — from 0.05 in 2024 to a central estimate of 0.04 (95% range 0.00–0.64). A 5-year backtest shows a typical error of ±170.5%, with 100% of held-out values landing inside the 95% band.
-21%Change by 2029
0.04Projected 2029 index
0.00–0.6495% range
±170.5%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.09 | 0.00 | 0.68 |
| 2026 | 0.08 | 0.00 | 0.67 |
| 2027 | 0.07 | 0.00 | 0.66 |
| 2028 | 0.05 | 0.00 | 0.65 |
| 2029 | 0.04 | 0.00 | 0.64 |
Olive-sided Flycatcher Survey Routes in Maine
| Pillsbury Pd | 13 | 1968 | 1968 |
| Telos | 5 | 2006 | 1995 |
| Baxter | 4 | 1988 | 1982 |
| Reeds | 3 | 2014 | 2014 |
| Northfield | 3 | 1981 | 1977 |
| Washburn | 3 | 1996 | 1980 |
| Topsfield | 2 | 1992 | 1978 |
| Hancock | 2 | 1976 | 1969 |
| Castine | 2 | 1997 | 1983 |
| Cooper | 2 | 1981 | 1978 |
| Seboomook Lk | 2 | 2014 | 1972 |
| Wytopitlock | 2 | 1982 | 1976 |
| Ludlow | 2 | 1993 | 1968 |
| Horse Mtn | 2 | 2011 | 1983 |
| St David | 2 | 2005 | 1982 |
| Heron Lake | 2 | 2003 | 1983 |
| Stacyville | 2 | 2021 | 2021 |
| Northfield 2 | 1 | 2013 | 1992 |
| Kittery Pt | 1 | 1978 | 1978 |
| Newcastle | 1 | 1988 | 1986 |
| Wilson Mills | 1 | 2024 | 1983 |
| Bethel | 1 | 2019 | 1979 |
| Nesowadnehun | 1 | 1997 | 1991 |
| Greenwood | 1 | 1979 | 1979 |
| South Arm | 1 | 1992 | 1975 |
Olive-sided Flycatcher Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.