Species · Connecticut · BBS 2025 Release · 1966–2024
Least Flycatcher Population Trend in Connecticut
Least Flycatcher in Connecticut has collapsed: down 84% on the route-weighted index since 1968.
-84%Since 1968
20Routes In State
58Years
Notable Least Flycatcher Trends in Connecticut
long arc declinecomputed index
Least Flycatcher has collapsed in Connecticut: down 84% on the route-weighted index since 1968.
Least Flycatcher Population Forecast in Connecticut
If the recent trend holds, Least Flycatcher in Connecticut is projected to fall about 100% by 2029 — from 1.3 in 2024 to a central estimate of 0.00 (95% range 0.00–1.5). A 5-year backtest shows a typical error of ±148.8%, with 80% of held-out values landing inside the 95% band.
-100%Change by 2029
0.00Projected 2029 index
0.00–1.595% range
±148.8%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.00 | 0.00 | 1.5 |
| 2026 | 0.00 | 0.00 | 1.5 |
| 2027 | 0.00 | 0.00 | 1.5 |
| 2028 | 0.00 | 0.00 | 1.5 |
| 2029 | 0.00 | 0.00 | 1.5 |
Least Flycatcher Survey Routes in Connecticut
| Woodstock 2 | 10 | 2024 | 2016 |
| Sherman | 3 | 2018 | 1972 |
| New Hartford | 3 | 1985 | 1972 |
| Warren | 2 | 2011 | 1972 |
| Long Hill | 2 | 1987 | 1973 |
| New Hartford | 2 | 2013 | 1995 |
| Warren 2 | 2 | 2024 | 2013 |
| Granby | 2 | 2019 | 1990 |
| Mystic | 1 | 2021 | 1973 |
| E Hartland | 1 | 1992 | 1966 |
| Buckingham | 1 | 2003 | 1966 |
| Uncasville | 1 | 2009 | 1977 |
| Woodstock | 1 | 2007 | 1968 |
| Westbrook | 1 | 1984 | 1981 |
| Willimantic | 1 | 2018 | 1967 |
| No Woodbury | 1 | 2018 | 1967 |
| Greenwich | 1 | 1978 | 1968 |
| Danbury | 1 | 1985 | 1968 |
| Mid Haddam | 1 | 2007 | 1973 |
| Southington | 1 | 1985 | 1976 |
Least Flycatcher Population Trend in Other States
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Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.