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Species · Michigan · BBS 2026 Release · 1966–2025

Hooded Warbler Population Trend in Michigan

All statesForest birds

Hooded Warbler in Michigan has surged: up 82% on the route-weighted index since 1984.

+82%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 →
15Routes 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 →
41YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Hooded 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 →

No notable trend signals for Hooded Warbler in Michigan. See the full index history below.

Hooded Warbler Population Forecast in Michigan

If the recent trend holds, Hooded Warbler in Michigan is projected to rise about 25% by 2030 — from 0.07 in 2025 to a central estimate of 0.09 (95% range 0.00–0.20). A 5-year backtest shows a typical error of ±108.5%, 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 →
0.09Projected 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 →
0.00–0.2095% 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 →
±108.5%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, Hooded Warbler in Michigan is projected to rise about 25% by 2030 — from 0.07 in 2025 to a central estimate of 0.09 (95% range 0.00–0.20). A 5-year backtest shows a typical error of ±108.5%, with 100% of held-out values landing inside the 95% band.19752030
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 →
20260.080.000.19
20270.080.000.19
20280.090.000.20
20290.090.000.20
20300.090.000.20

Hooded Warbler Survey Routes in Michigan

Routes recording Hooded 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 →
Monterey320251981
Allegan Wma220122004
Nashville120192009
Howardsville120222022
Deckerville120132013
Mottville119971975
Belding 2120162016
Lapeer120242013
Cohoctah120222022
New Buffalo120101993
Almena120142002
Barry S.G.A.120081995
Lawrence120012001
Bravo120231981
Homer120102010

Hooded Warbler Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianakentuckylouisianamarylandmassachusettsmississippimissourinew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniarhode-islandsouth-carolinatennesseetexasvirginiawest-virginiawisconsin

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