Species · Maine · BBS 2025 Release · 1966–2024
Evening Grosbeak Population Trend in Maine
Evening Grosbeak in Maine has collapsed: down 86% on the route-weighted index since 1968.
-86%Since 1968
67Routes In State
45Years
Notable Evening Grosbeak Trends in Maine
long arc declinecomputed index
Evening Grosbeak has collapsed in Maine: down 86% on the route-weighted index since 1968.
Evening Grosbeak Population Forecast in Maine
If the recent trend holds, Evening Grosbeak in Maine is projected to fall about 83% by 2017 — from 0.08 in 2012 to a central estimate of 0.01 (95% range 0.00–11). A 5-year backtest shows a typical error of ±708.5%, with 100% of held-out values landing inside the 95% band.
-83%Change by 2017
0.01Projected 2017 index
0.00–1195% range
±708.5%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2013 | 0.64 | 0.00 | 12 |
| 2014 | 0.48 | 0.00 | 11 |
| 2015 | 0.33 | 0.00 | 11 |
| 2016 | 0.17 | 0.00 | 11 |
| 2017 | 0.01 | 0.00 | 11 |
Evening Grosbeak Survey Routes in Maine
| Northfield | 14 | 1981 | 1976 |
| Waite | 10 | 1977 | 1977 |
| Forest Sta | 9 | 2000 | 1966 |
| Baxter | 8 | 1984 | 1977 |
| Ludlow | 6 | 1998 | 1968 |
| Boundary | 6 | 1997 | 1993 |
| Greenville | 5 | 1999 | 1976 |
| Grnd Lk Strm | 5 | 2000 | 1991 |
| Cooper | 4 | 2003 | 1976 |
| Moose River | 4 | 2008 | 1983 |
| Big Twenty | 4 | 2008 | 1993 |
| Telos | 4 | 2001 | 1995 |
| Westbrook | 3 | 1993 | 1989 |
| Wilson Mills | 3 | 2007 | 1983 |
| South Arm | 3 | 1985 | 1979 |
| Eastbrook | 3 | 1996 | 1979 |
| Winn | 3 | 1999 | 1969 |
| Hudson | 3 | 2000 | 1976 |
| Clayton Lake | 3 | 2001 | 1977 |
| Church Hill | 3 | 2005 | 1994 |
| Newcastle | 2 | 2007 | 1990 |
| Reeds | 2 | 2008 | 1995 |
| Topsfield | 2 | 1979 | 1978 |
| Hancock | 2 | 2000 | 1972 |
| Castine | 2 | 2004 | 1986 |
Evening Grosbeak Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.