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

Northern Parula Population Trend in Wisconsin

All statesForest birds

Northern Parula in Wisconsin has surged: up 142% on the route-weighted index since 1968.

+142%Since 1968
42Routes In State
58Years

Notable Northern Parula Trends in Wisconsin

long arc increasecomputed index

Northern Parula has surged in Wisconsin: up 142% on the route-weighted index since 1968.

Northern Parula Population Forecast in Wisconsin

If the recent trend holds, Northern Parula in Wisconsin is projected to rise about 25% by 2029 — from 0.47 in 2024 to a central estimate of 0.59 (95% range 0.38–0.80). A 5-year backtest shows a typical error of ±18.7%, with 100% of held-out values landing inside the 95% band.

+25%Change by 2029
0.59Projected 2029 index
0.38–0.8095% range
±18.7%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
20250.560.350.77
20260.570.360.78
20270.570.370.78
20280.580.370.79
20290.590.380.80

Northern Parula Survey Routes in Wisconsin

Routes recording Northern Parula in Wisconsin.
Land O Lakes920161967
Eagle River720241966
Land O' Lakes 2520242017
Popple River420241966
Cavour420241998
Conover320241998
Bayfield220241969
Shanagolden220241966
Couderay220151969
Rib Lake220241970
Crandon220241967
Weirgor Springs220092009
Flambeau220241999
Rhinelander220231998
Chaffey120111979
Iron River120241967
Minong120141971
Grand View120241967
Montreal120241968
Dresser120182018
Loraine120071984
Cumberland120162016
Weyerhauser119741974
Gilman120122012
Phillips120092009

Northern Parula Population Trend in Other States

alabamaarkansascaliforniaconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourinebraskanew-hampshirenew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginia

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