Species · Massachusetts · BBS 2025 Release · 1966–2024
Barred Owl Population Trend in Massachusetts
Barred Owl in Massachusetts has surged: up 111% on the route-weighted index since 1976.
+111%Since 1976
22Routes In State
44Years
Notable Barred Owl Trends in Massachusetts
long arc increasecomputed index
Barred Owl has surged in Massachusetts: up 111% on the route-weighted index since 1976.
Barred Owl Population Forecast in Massachusetts
If the recent trend holds, Barred Owl in Massachusetts is projected to fall about 36% by 2029 — from 0.40 in 2024 to a central estimate of 0.26 (95% range 0.00–0.53). A 5-year backtest shows a typical error of ±223%, with 100% of held-out values landing inside the 95% band.
-36%Change by 2029
0.26Projected 2029 index
0.00–0.5395% range
±223%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.24 | 0.00 | 0.51 |
| 2026 | 0.25 | 0.00 | 0.52 |
| 2027 | 0.25 | 0.00 | 0.52 |
| 2028 | 0.25 | 0.00 | 0.52 |
| 2029 | 0.26 | 0.00 | 0.53 |
Barred Owl Survey Routes in Massachusetts
| Belchertown | 5 | 2024 | 1995 |
| Holden | 2 | 2022 | 1979 |
| Marion | 1 | 1976 | 1976 |
| Ware River | 1 | 2018 | 1993 |
| Prattville | 1 | 2005 | 2005 |
| Maynard | 1 | 2016 | 2016 |
| Littleton | 1 | 1995 | 1976 |
| Princeton | 1 | 1970 | 1970 |
| E Pepperell | 1 | 1975 | 1975 |
| Warren | 1 | 1970 | 1970 |
| S Barre | 1 | 2016 | 2006 |
| N Orange | 1 | 2024 | 1976 |
| Cummington | 1 | 2012 | 1981 |
| Chesterfield | 1 | 2019 | 1999 |
| Cheshire | 1 | 1986 | 1982 |
| Pittsfield | 1 | 2001 | 1976 |
| Sheffield | 1 | 2012 | 1980 |
| Monterey | 1 | 2022 | 2022 |
| N. Andover | 1 | 2004 | 2004 |
| Warren 2 | 1 | 2017 | 2016 |
| Cummington 2 | 1 | 2022 | 2017 |
| Hancock | 1 | 2014 | 1999 |
Barred Owl Population Trend in Other States
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Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.