BirdAnalyst
Species · Wisconsin · BBS 2025 Release · 1966–2024

Pine Warbler Population Trend in Wisconsin

All statesForest birds

Pine Warbler in Wisconsin has surged: up 22× on the route-weighted index since 1968.

22×Since 1968
60Routes In State
58Years

Notable Pine Warbler Trends in Wisconsin

long arc increasecomputed index

Pine Warbler has surged in Wisconsin: up 22× on the route-weighted index since 1968.

Pine Warbler Population Forecast in Wisconsin

If the recent trend holds, Pine Warbler in Wisconsin is projected to rise about 16% by 2029 — from 2.8 in 2024 to a central estimate of 3.2 (95% range 2.5–3.9). A 5-year backtest shows a typical error of ±8.7%, with 100% of held-out values landing inside the 95% band.

+16%Change by 2029
3.2Projected 2029 index
2.5–3.995% range
±8.7%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
20253.02.33.7
20263.02.43.7
20273.12.43.8
20283.22.53.8
20293.22.53.9

Pine Warbler Survey Routes in Wisconsin

Routes recording Pine Warbler in Wisconsin.
Land O Lakes2420161967
Wausaukee2420241980
Conover2120241998
Eagle River1820241966
Hatfield1719981970
Amberg1420241981
Grand View1320241966
Pigeon Creek1320241999
Mcnaughton1320241970
Land O' Lakes 21320242017
Union Twp1020241975
Shanagolden920241975
Cumberland920241966
Irma920241969
Bayfield820241967
Mather820231966
Rhinelander820231998
Iron River720241970
Cadott720241975
Couderay620191969
Exeland620241972
Oconto Falls620191968
Popple River420241976
Unity420242006
Stevens Pt320231999

Pine Warbler Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianakentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinew-hampshirenew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniarhode-islandsouth-carolinatennesseetexasvermontvirginiawest-virginia

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