Species · Connecticut · BBS 2025 Release · 1966–2024
Carolina Wren Population Trend in Connecticut
Carolina Wren in Connecticut has surged: up 33× on the route-weighted index since 1976.
33×Since 1976
20Routes In State
49Years
Notable Carolina Wren Trends in Connecticut
long arc increasecomputed index
Carolina Wren has surged in Connecticut: up 33× on the route-weighted index since 1976.
Carolina Wren Population Forecast in Connecticut
If the recent trend holds, Carolina Wren in Connecticut is projected to fall about 31% by 2029 — from 10 in 2024 to a central estimate of 7.1 (95% range 4.4–9.8). A 5-year backtest shows a typical error of ±37.4%, with 40% of held-out values landing inside the 95% band.
-31%Change by 2029
7.1Projected 2029 index
4.4–9.895% range
±37.4%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 6.6 | 3.8 | 9.3 |
| 2026 | 6.7 | 4.0 | 9.4 |
| 2027 | 6.8 | 4.1 | 9.6 |
| 2028 | 7.0 | 4.3 | 9.7 |
| 2029 | 7.1 | 4.4 | 9.8 |
Carolina Wren Survey Routes in Connecticut
| Long Hill | 20 | 2019 | 1982 |
| Westbrook | 18 | 2024 | 1977 |
| Uncasville | 17 | 2024 | 1988 |
| Danbury | 17 | 2023 | 2005 |
| Mid Haddam | 14 | 2024 | 1990 |
| Mystic | 11 | 2023 | 1974 |
| Buckingham | 9 | 2022 | 1975 |
| Woodstock 2 | 9 | 2024 | 2017 |
| Granby | 9 | 2024 | 1991 |
| Southington | 7 | 2024 | 1990 |
| New Hartford | 7 | 2024 | 2007 |
| Warren 2 | 7 | 2024 | 2023 |
| No Woodbury | 5 | 2024 | 1993 |
| Greenwich | 5 | 2018 | 1976 |
| Sherman | 3 | 2019 | 1989 |
| Willimantic | 2 | 2018 | 1975 |
| E Hartland | 1 | 1992 | 1992 |
| Woodstock | 1 | 1994 | 1991 |
| Warren | 1 | 2011 | 1991 |
| New Hartford | 1 | 1978 | 1976 |
Carolina Wren Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.