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Species · Michigan · BBS 2026 Release · 1966–2025

Wood Thrush Population Trend in Michigan

All statesForest birds

Wood Thrush in Michigan has edged up: up 11% on the route-weighted index since 1968.

+11%Since 1968TrendPercent 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 →
102Routes 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 →
59YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Wood Thrush 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 →

No notable trend signals for Wood Thrush in Michigan. See the full index history below.

Wood Thrush Population Forecast in Michigan

If the recent trend holds, Wood Thrush in Michigan is projected to fall about 25% by 2030 — from 2.8 in 2025 to a central estimate of 2.1 (95% range 1.2–3.0). A 5-year backtest shows a typical error of ±26%, with 100% of held-out values landing inside the 95% band.

-25%Change by 2030TrendPercent 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 →
2.1Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
1.2–3.095% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±26%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Wood Thrush in Michigan is projected to fall about 25% by 2030 — from 2.8 in 2025 to a central estimate of 2.1 (95% range 1.2–3.0). A 5-year backtest shows a typical error of ±26%, with 100% of held-out values landing inside the 95% band.19662030
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20262.11.23.0
20272.11.23.0
20282.11.23.0
20292.11.23.0
20302.11.23.0

Wood Thrush Survey Routes in Michigan

Routes recording Wood Thrush 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 →
Barry S.G.A. 22120192013
Pleasant Valley 21520252004
Barry S.G.A.1320121995
Allegan Wma1220191993
Scottville1120251968
Monterey1120251978
Almena1020151993
Brocky Lake819951995
Hubbard Lake819891973
Crystal Fls720251979
Isabella720121966
No Bradley620251970
Chippewa Lk.620251992
Remus520251974
Mottville520251967
Isabella 2520252013
Harrietta520251990
Hungerford520251991
Bergland420221979
Maple Grove420251970
Nashville420251968
Howardsville420241972
Tyre419961967
Cohoctah420252021
Hamburg420011981

Wood Thrush Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsminnesotamississippimissourinebraskanew-hampshirenew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsin

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.