Species · Wisconsin · BBS 2025 Release · 1966–2024
Northern Waterthrush Population Trend in Wisconsin
Northern Waterthrush in Wisconsin has surged: up 382% on the route-weighted index since 1968.
+382%Since 1968
51Routes In State
58Years
Notable Northern Waterthrush Trends in Wisconsin
long arc increasecomputed index
Northern Waterthrush has surged in Wisconsin: up 382% on the route-weighted index since 1968.
Northern Waterthrush Population Forecast in Wisconsin
If the recent trend holds, Northern Waterthrush in Wisconsin is projected to rise about 13% by 2029 — from 0.27 in 2024 to a central estimate of 0.31 (95% range 0.12–0.50). A 5-year backtest shows a typical error of ±21.3%, with 100% of held-out values landing inside the 95% band.
+13%Change by 2029
0.31Projected 2029 index
0.12–0.5095% range
±21.3%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.30 | 0.11 | 0.49 |
| 2026 | 0.30 | 0.11 | 0.49 |
| 2027 | 0.30 | 0.12 | 0.49 |
| 2028 | 0.31 | 0.12 | 0.49 |
| 2029 | 0.31 | 0.12 | 0.50 |
Northern Waterthrush Survey Routes in Wisconsin
| Cavour | 4 | 2023 | 1998 |
| Grimms | 4 | 2021 | 1999 |
| Chaffey | 3 | 2013 | 1976 |
| Montreal | 3 | 2024 | 1969 |
| Merrill | 3 | 2024 | 1966 |
| Wausaukee | 3 | 2023 | 1980 |
| Unity | 3 | 1974 | 1974 |
| Flambeau | 3 | 2024 | 2000 |
| Holway | 2 | 1976 | 1968 |
| Rib Lake | 2 | 2024 | 1966 |
| Irma | 2 | 2023 | 1984 |
| Amberg | 2 | 2024 | 1980 |
| Casco | 2 | 2023 | 1967 |
| Gresham | 2 | 2024 | 1998 |
| Iron River | 1 | 2022 | 1986 |
| Grand View | 1 | 2011 | 1972 |
| Bayfield | 1 | 2021 | 1977 |
| Shanagolden | 1 | 2024 | 1969 |
| Land O Lakes | 1 | 2002 | 2002 |
| Dresser | 1 | 2010 | 2010 |
| Loraine | 1 | 2015 | 2006 |
| Cumberland | 1 | 2012 | 2005 |
| Weyerhauser | 1 | 2015 | 1985 |
| Couderay | 1 | 2011 | 1992 |
| Exeland | 1 | 2024 | 2001 |
Northern Waterthrush Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.