Species · New Hampshire · BBS 2025 Release · 1966–2024
Lincoln's Sparrow Population Trend in New Hampshire
Lincoln's Sparrow in New Hampshire has fallen sharply: down 75% on the route-weighted index since 1968.
-75%Since 1968
6Routes In State
58Years
Notable Lincoln's Sparrow Trends in New Hampshire
long arc declinecomputed index
Lincoln's Sparrow has fallen sharply in New Hampshire: down 75% on the route-weighted index since 1968.
Lincoln's Sparrow Population Forecast in New Hampshire
If the recent trend holds, Lincoln's Sparrow in New Hampshire is projected to fall about 71% by 2029 — from 0.14 in 2024 to a central estimate of 0.04 (95% range 0.00–0.48). A 5-year backtest shows a typical error of ±43.7%, with 100% of held-out values landing inside the 95% band.
-71%Change by 2029
0.04Projected 2029 index
0.00–0.4895% range
±43.7%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.07 | 0.00 | 0.51 |
| 2026 | 0.07 | 0.00 | 0.50 |
| 2027 | 0.06 | 0.00 | 0.49 |
| 2028 | 0.05 | 0.00 | 0.49 |
| 2029 | 0.04 | 0.00 | 0.48 |
Lincoln's Sparrow Survey Routes in New Hampshire
| Dixville Notch 2 | 3 | 2024 | 2018 |
| Dixvil Notch | 2 | 2017 | 1966 |
| Franconia | 1 | 1994 | 1980 |
| Milan | 1 | 2010 | 1970 |
| Stratford | 1 | 1998 | 1967 |
| Clarksville | 1 | 2012 | 1969 |
Lincoln's Sparrow Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.