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Species · Michigan · BBS 2025 Release · 1966–2024

Louisiana Waterthrush Population Trend in Michigan

All statesForest birds

Louisiana Waterthrush in Michigan has edged down: down 10% on the route-weighted index since 1982.

-10%Since 1982TrendPercent 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 →
6Routes 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 →
21YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Louisiana Waterthrush 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 Louisiana Waterthrush in Michigan. See the full index history below.

Louisiana Waterthrush Population Forecast in Michigan

If the recent trend holds, Louisiana Waterthrush in Michigan is projected to stay roughly flat through 2018, near 0.02 (95% range 0.00–0.06). A 5-year backtest shows a typical error of ±80.4%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2018TrendPercent 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 →
0.02Projected 2018 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.0695% 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 →
±80.4%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, Louisiana Waterthrush in Michigan is projected to stay roughly flat through 2018, near 0.02 (95% range 0.00–0.06). A 5-year backtest shows a typical error of ±80.4%, with 100% of held-out values landing inside the 95% band.19802018
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 →
20140.020.000.06
20150.020.000.06
20160.020.000.06
20170.020.000.06
20180.020.000.06

Louisiana Waterthrush Survey Routes in Michigan

Routes recording Louisiana Waterthrush 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 →
Belding119831983
Monterey120111981
Remus119971991
New Buffalo120091995
Almena120131999
Bravo120101980

Louisiana Waterthrush Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsminnesotamississippimissourinew-hampshirenew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniarhode-islandsouth-carolinatennesseetexasvermontvirginiawest-virginiawisconsin

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