Species · Massachusetts · BBS 2025 Release · 1966–2024
Scarlet Tanager Population Trend in Massachusetts
Scarlet Tanager in Massachusetts has held roughly steady: up 8% on the route-weighted index since 1968.
+8%Since 1968
32Routes In State
58Years
Notable Scarlet Tanager Trends in Massachusetts
No notable trend signals for Scarlet Tanager in Massachusetts. See the full index history below.
Scarlet Tanager Population Forecast in Massachusetts
If the recent trend holds, Scarlet Tanager in Massachusetts is projected to rise about 21% by 2029 — from 3.0 in 2024 to a central estimate of 3.6 (95% range 1.4–5.8). A 5-year backtest shows a typical error of ±16.1%, with 100% of held-out values landing inside the 95% band.
+21%Change by 2029
3.6Projected 2029 index
1.4–5.895% range
±16.1%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 3.8 | 1.6 | 5.9 |
| 2026 | 3.7 | 1.5 | 5.9 |
| 2027 | 3.7 | 1.5 | 5.9 |
| 2028 | 3.7 | 1.5 | 5.9 |
| 2029 | 3.6 | 1.4 | 5.8 |
Scarlet Tanager Survey Routes in Massachusetts
| Monterey | 12 | 2024 | 2019 |
| Ware River | 10 | 2022 | 1993 |
| N Orange | 8 | 2024 | 1968 |
| Pittsfield | 8 | 2016 | 1967 |
| Sheffield | 8 | 2022 | 1969 |
| Brockton | 6 | 2017 | 1967 |
| Princeton | 5 | 1976 | 1969 |
| Belchertown | 5 | 2024 | 1967 |
| Cummington | 5 | 2014 | 1968 |
| Cummington 2 | 5 | 2024 | 2015 |
| Cheshire | 4 | 1994 | 1969 |
| Hancock | 4 | 2015 | 1997 |
| Prattville | 3 | 2019 | 1966 |
| Maynard | 3 | 2022 | 1967 |
| Littleton | 3 | 2023 | 1967 |
| S Barre | 3 | 2024 | 1968 |
| Newburyport | 2 | 2022 | 1967 |
| N Oxford | 2 | 2024 | 1968 |
| E Pepperell | 2 | 1994 | 1968 |
| Warren | 2 | 2009 | 1968 |
| Chesterfield | 2 | 2024 | 1967 |
| Wellfleet 2 | 2 | 2017 | 2017 |
| Holden | 2 | 2024 | 1977 |
| N. Andover | 2 | 2024 | 1995 |
| Warren 2 | 2 | 2024 | 2010 |
Scarlet Tanager Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.