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

Magnolia Warbler Population Trend in Wisconsin

All statesForest birds

Magnolia Warbler in Wisconsin has surged: up 400% on the route-weighted index since 1969.

+400%Since 1969
35Routes In State
57Years

Notable Magnolia Warbler Trends in Wisconsin

long arc increasecomputed index

Magnolia Warbler has surged in Wisconsin: up 400% on the route-weighted index since 1969.

Magnolia Warbler Population Forecast in Wisconsin

If the recent trend holds, Magnolia Warbler in Wisconsin is projected to rise about 41% by 2029 — from 0.38 in 2024 to a central estimate of 0.54 (95% range 0.32–0.76). A 5-year backtest shows a typical error of ±24.1%, with 100% of held-out values landing inside the 95% band.

+41%Change by 2029
0.54Projected 2029 index
0.32–0.7695% range
±24.1%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
20250.510.300.73
20260.520.300.74
20270.530.310.74
20280.530.320.75
20290.540.320.76

Magnolia Warbler Survey Routes in Wisconsin

Routes recording Magnolia Warbler in Wisconsin.
Land O' Lakes 21020242017
Land O Lakes820161970
Eagle River720241966
Irma320231969
Hollister320161997
Rhinelander320232000
Cavour320241998
Shanagolden220241969
Montreal220241968
Mcnaughton220241970
Wausaukee220181981
Mather220002000
Chaffey120211970
Iron River120241971
Minong120131971
Grand View120241972
Bayfield120211973
Pigeon Creek120212015
Loraine120181982
Cumberland120182017
Couderay120181987
Phillips120081985
Rib Lake120131971
Merrill119981989
Popple River120241968

Magnolia Warbler Population Trend in Other States

connecticutmainemarylandmassachusettsmichiganminnesotanew-hampshirenew-jerseynew-yorknorth-carolinaohiopennsylvaniavermontvirginiawest-virginia

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