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Species · Wisconsin · BBS 2025 Release · 1966–2024

Nashville Warbler Population Trend in Wisconsin

All statesForest birds

Nashville Warbler in Wisconsin has surged: up 96% on the route-weighted index since 1968.

+96%Since 1968
58Routes In State
58Years

Notable Nashville Warbler Trends in Wisconsin

long arc increasecomputed index

Nashville Warbler has surged in Wisconsin: up 96% on the route-weighted index since 1968.

Nashville Warbler Population Forecast in Wisconsin

If the recent trend holds, Nashville Warbler in Wisconsin is projected to rise about 72% by 2029 — from 3.1 in 2024 to a central estimate of 5.4 (95% range 2.8–8.0). A 5-year backtest shows a typical error of ±46.1%, with 80% of held-out values landing inside the 95% band.

+72%Change by 2029
5.4Projected 2029 index
2.8–8.095% range
±46.1%Backtest error
19662029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20255.22.67.8
20265.32.77.8
20275.32.77.9
20285.32.87.9
20295.42.88.0

Nashville Warbler Survey Routes in Wisconsin

Routes recording Nashville Warbler in Wisconsin.
Land O' Lakes 22920242017
Popple River2020241967
Cavour2020241998
Mcnaughton1920241968
Eagle River1920241966
Conover1920241998
Montreal1520241968
Rhinelander1520231998
Land O Lakes1420161967
Amberg1420241980
Iron River1120241967
Pigeon Creek1020242008
Couderay920191969
Flambeau920241998
Shanagolden820241966
Mellen820242002
Irma720241967
Amnicon Falls720241998
Wausaukee620241980
Grand View520241966
Bayfield520241967
Washington I520231967
Minong420241967
Loraine420181966
Rib Lake320241966

Nashville Warbler Population Trend in Other States

californiaconnecticutidahomainemarylandmassachusettsmichiganminnesotamontananew-hampshirenew-jerseynew-yorknorth-dakotaoregonpennsylvaniarhode-islandvermontvirginiawashingtonwest-virginia

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.