Species · New Jersey · BBS 2025 Release · 1966–2024
Chestnut-sided Warbler Population Trend in New Jersey
Chestnut-sided Warbler in New Jersey has increased: up 47% on the route-weighted index since 1970.
+47%Since 1970
20Routes In State
55Years
Notable Chestnut-sided Warbler Trends in New Jersey
No notable trend signals for Chestnut-sided Warbler in New Jersey. See the full index history below.
Chestnut-sided Warbler Population Forecast in New Jersey
If the recent trend holds, Chestnut-sided Warbler in New Jersey is projected to rise about 102% by 2029 — from 0.19 in 2024 to a central estimate of 0.38 (95% range 0.00–0.77). A 5-year backtest shows a typical error of ±147.7%, with 100% of held-out values landing inside the 95% band.
+102%Change by 2029
0.38Projected 2029 index
0.00–0.7795% range
±147.7%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.37 | 0.00 | 0.76 |
| 2026 | 0.38 | 0.00 | 0.76 |
| 2027 | 0.38 | 0.00 | 0.76 |
| 2028 | 0.38 | 0.00 | 0.76 |
| 2029 | 0.38 | 0.00 | 0.77 |
Chestnut-sided Warbler Survey Routes in New Jersey
| Roosevelt | 5 | 2007 | 1990 |
| High Point | 3 | 2024 | 1977 |
| Toms River | 1 | 1966 | 1966 |
| Sandbrook | 1 | 2005 | 1969 |
| New Bedford | 1 | 1971 | 1971 |
| Croton | 1 | 2007 | 1980 |
| Robbinsville | 1 | 1977 | 1977 |
| Hope | 1 | 1993 | 1978 |
| Midvale | 1 | 1988 | 1970 |
| Kemah Lake | 1 | 2015 | 1975 |
| Bloomsbury | 1 | 1991 | 1991 |
| Dover | 1 | 2022 | 1978 |
| Pottersville | 1 | 2018 | 1980 |
| Gillette | 1 | 2024 | 1997 |
| Keyport | 1 | 2002 | 2002 |
| Cranbury | 1 | 1987 | 1987 |
| Friendship | 1 | 1982 | 1982 |
| Pedricktown | 1 | 1998 | 1997 |
| Croton 2 | 1 | 2023 | 2008 |
| Ramseysburg | 1 | 2016 | 2010 |
Chestnut-sided Warbler Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.