Species · Maine · BBS 2025 Release · 1966–2024
Ring-necked Duck Population Trend in Maine
Ring-necked Duck in Maine has fallen sharply: down 64% on the route-weighted index since 1986.
-64%Since 1986
12Routes In State
18Years
Notable Ring-necked Duck Trends in Maine
long arc declinecomputed index
Ring-necked Duck has fallen sharply in Maine: down 64% on the route-weighted index since 1986.
Ring-necked Duck Population Forecast in Maine
If the recent trend holds, Ring-necked Duck in Maine is projected to stay roughly flat through 2018, near 0.02 (95% range 0.00–0.11). A 5-year backtest shows a typical error of ±148.2%, with 60% of held-out values landing inside the 95% band.
n/aChange by 2018
0.02Projected 2018 index
0.00–0.1195% range
±148.2%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2014 | 0.03 | 0.00 | 0.12 |
| 2015 | 0.03 | 0.00 | 0.12 |
| 2016 | 0.02 | 0.00 | 0.12 |
| 2017 | 0.02 | 0.00 | 0.11 |
| 2018 | 0.02 | 0.00 | 0.11 |
Ring-necked Duck Survey Routes in Maine
| Boundary | 3 | 2004 | 2004 |
| Carrabassett | 2 | 1988 | 1988 |
| Medway | 2 | 2003 | 1979 |
| Horse Mtn | 2 | 1985 | 1985 |
| Moose River | 2 | 2007 | 1986 |
| Greenville | 1 | 2013 | 2013 |
| Baker Lake | 1 | 2004 | 2001 |
| Grnd Lk Strm | 1 | 2000 | 1991 |
| Ft Fairfield | 1 | 1993 | 1993 |
| Hancock | 1 | 1998 | 1979 |
| Aurora | 1 | 2012 | 1995 |
| Cooper | 1 | 2003 | 2003 |
Ring-necked Duck Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.