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

Bay-breasted Warbler Population Trend in Michigan

All statesForest birds

Bay-breasted Warbler in Michigan has risen sharply: up 68% on the route-weighted index since 1987.

+68%Since 1987TrendPercent 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 →
16Routes 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 Bay-breasted Warbler 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 increasecomputed 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 →

Bay-breasted Warbler has risen sharply in Michigan: up 68% on the route-weighted index since 1987.

Bay-breasted Warbler Survey Routes in Michigan

Routes recording Bay-breasted Warbler 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 →
Bergland320222022
Seney Nwr320112011
Gibbs City219941994
Walloon Lake219801980
Cunard220191987
Marenisco120172012
Bootjack119951995
Ned Lake120222022
Herman120222013
Pickford120242015
Brocky Lake119811981
Shingleton119881988
Creighton119801980
Isabella 2120182018
Tahquamenon120132010
Gilchrist120032003

Bay-breasted Warbler Population Trend in Other States

maineminnesotanew-hampshirenew-yorkpennsylvaniavermontwisconsin

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