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Species · Wisconsin · BBS 2025 Release · 1966–2024

Tennessee Warbler Population Trend in Wisconsin

All statesForest birds

Tennessee Warbler in Wisconsin has declined: down 25% on the route-weighted index since 1984.

-25%Since 1984TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
11Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
13YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Tennessee Warbler Trends in WisconsinNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for Tennessee Warbler in Wisconsin. See the full index history below.

Tennessee Warbler Survey Routes in Wisconsin

Routes recording Tennessee Warbler in Wisconsin.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Chaffey119971997
Iron River120111987
Shanagolden119861986
Montreal119861977
Union Twp119991999
Loraine119971997
Bashaw120002000
Flambeau120152015
Eagle River119971995
Beaver Dam119931993
Washington I119941976

Tennessee Warbler Population Trend in Other States

alaskamainemichiganminnesotamontananew-hampshirenew-yorkpennsylvaniavermont

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