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Species · Wisconsin · BBS 2025 Release · 1966–2024

Boreal Chickadee Population Trend in Wisconsin

All statesForest birds

Boreal Chickadee in Wisconsin has declined: down 44% on the route-weighted index since 1973.

-44%Since 1973TrendPercent 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 →
5Routes 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 →
12YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Boreal Chickadee 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 Boreal Chickadee in Wisconsin. See the full index history below.

Boreal Chickadee Survey Routes in Wisconsin

Routes recording Boreal Chickadee 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 →
Shanagolden220001998
Irma119811980
Eagle River119971971
Popple River119771971
Crandon119721972

Boreal Chickadee Population Trend in Other States

alaskamainemichiganminnesotamontananew-hampshirenew-yorkvermont

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