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

Boreal Chickadee Population Trend in Michigan

All statesForest birds

Boreal Chickadee in Michigan has fallen sharply: down 74% on the route-weighted index since 1975.

-74%Since 1975TrendPercent 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 →
12Routes 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 →
17YearsYears 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 MichiganNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

long arc declinecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Boreal Chickadee has fallen sharply in Michigan: down 74% on the route-weighted index since 1975.

Boreal Chickadee Survey Routes in Michigan

Routes recording Boreal Chickadee in Michigan.
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 →
Ned Lake219871987
Cunard219821974
Tahquamenon219741974
Bergland119901989
Imp Lake119991995
Pine River120142014
Gibbs City120171987
Raco119921973
Ishpeming119841984
Brocky Lake120042004
Wilson120022002
Isabella119751974

Boreal Chickadee Population Trend in Other States

alaskamaineminnesotamontananew-hampshirenew-yorkvermontwisconsin

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