Species · Maine · BBS 2025 Release · 1966–2024
Rose-breasted Grosbeak Population Trend in Maine
Rose-breasted Grosbeak in Maine has fallen sharply: down 61% on the route-weighted index since 1968.
-61%Since 1968
76Routes In State
58Years
Notable Rose-breasted Grosbeak Trends in Maine
long arc declinecomputed index
Rose-breasted Grosbeak has fallen sharply in Maine: down 61% on the route-weighted index since 1968.
Rose-breasted Grosbeak Population Forecast in Maine
If the recent trend holds, Rose-breasted Grosbeak in Maine is projected to fall about 28% by 2029 — from 1.2 in 2024 to a central estimate of 0.87 (95% range 0.00–4.7). A 5-year backtest shows a typical error of ±79.7%, with 100% of held-out values landing inside the 95% band.
-28%Change by 2029
0.87Projected 2029 index
0.00–4.795% range
±79.7%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 1.1 | 0.00 | 4.9 |
| 2026 | 1.1 | 0.00 | 4.8 |
| 2027 | 0.99 | 0.00 | 4.8 |
| 2028 | 0.93 | 0.00 | 4.7 |
| 2029 | 0.87 | 0.00 | 4.7 |
Rose-breasted Grosbeak Survey Routes in Maine
| Northfield | 29 | 1981 | 1976 |
| Waite | 12 | 1977 | 1977 |
| Benton | 7 | 1980 | 1977 |
| Pillsbury Pd | 7 | 1968 | 1968 |
| Washburn | 7 | 2005 | 1979 |
| Clayton Lake 2 | 7 | 2013 | 2010 |
| Westbrook | 6 | 2024 | 1977 |
| Turner | 6 | 2002 | 1973 |
| Manchester | 6 | 1995 | 1971 |
| Baxter | 6 | 1988 | 1977 |
| Warren | 5 | 1990 | 1973 |
| Ft Fairfield | 5 | 2005 | 1993 |
| Otisfield Gr | 4 | 2015 | 1977 |
| Carrying Pl | 4 | 2024 | 1979 |
| Ludlow | 4 | 1998 | 1968 |
| Priestly Br. | 4 | 2013 | 1994 |
| Baker Lake 2 | 4 | 2013 | 2010 |
| Jefferson | 4 | 2009 | 1991 |
| Hermon | 3 | 2019 | 1966 |
| Searsport | 3 | 2024 | 2002 |
| Cape Neddick | 2 | 2022 | 1974 |
| Biddeford | 2 | 2006 | 1973 |
| Hartford | 2 | 2024 | 1975 |
| East Troy | 2 | 2018 | 1973 |
| Freedom | 2 | 2022 | 1973 |
Rose-breasted Grosbeak Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.