Species · Minnesota · BBS 2025 Release · 1966–2024
Connecticut Warbler Population Trend in Minnesota
Connecticut Warbler in Minnesota has declined: down 32% on the route-weighted index since 1970.
-32%Since 1970
31Routes In State
56Years
Notable Connecticut Warbler Trends in Minnesota
No notable trend signals for Connecticut Warbler in Minnesota. See the full index history below.
Connecticut Warbler Population Forecast in Minnesota
If the recent trend holds, Connecticut Warbler in Minnesota is projected to rise about 173% by 2029 — from 0.07 in 2024 to a central estimate of 0.20 (95% range 0.00–0.49). A 5-year backtest shows a typical error of ±226.6%, with 100% of held-out values landing inside the 95% band.
+173%Change by 2029
0.20Projected 2029 index
0.00–0.4995% range
±226.6%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.21 | 0.00 | 0.51 |
| 2026 | 0.21 | 0.00 | 0.50 |
| 2027 | 0.20 | 0.00 | 0.50 |
| 2028 | 0.20 | 0.00 | 0.50 |
| 2029 | 0.20 | 0.00 | 0.49 |
Connecticut Warbler Survey Routes in Minnesota
| Waskish | 4 | 2019 | 1978 |
| Red Lake | 4 | 2024 | 1995 |
| Grygla | 3 | 1987 | 1987 |
| Mille Lacs | 2 | 1996 | 1996 |
| Floodwood | 2 | 2012 | 1978 |
| Crane Lake | 2 | 2003 | 1969 |
| Blackduck | 2 | 2004 | 2004 |
| Greenbush | 2 | 2016 | 2016 |
| Cass Lake | 1 | 1993 | 1984 |
| Nebish | 1 | 2019 | 1987 |
| Cromwell | 1 | 2019 | 1967 |
| Backus | 1 | 1986 | 1971 |
| Pine River | 1 | 1979 | 1979 |
| Evergreen | 1 | 1983 | 1983 |
| Hovland | 1 | 1995 | 1976 |
| Lockport | 1 | 1983 | 1967 |
| Sawbill Lndg | 1 | 2018 | 1973 |
| Hart Lake | 1 | 2010 | 1972 |
| Island Lake | 1 | 2016 | 1979 |
| Cohasset | 1 | 1991 | 1974 |
| Sherry Lake | 1 | 2021 | 1969 |
| Bena | 1 | 1977 | 1977 |
| Debs | 1 | 1992 | 1987 |
| Little Fork | 1 | 2019 | 1969 |
| Lude | 1 | 2014 | 1978 |
Connecticut Warbler Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.