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Species · Michigan · BBS 2026 Release · 1966–2025

Warbling Vireo Population Trend in Michigan

All statesForest birds

Warbling Vireo in Michigan has edged up: up 13% on the route-weighted index since 1968.

+13%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 →
97Routes 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 Warbling Vireo 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 Warbling Vireo in Michigan. See the full index history below.

Warbling Vireo Population Forecast in Michigan

If the recent trend holds, Warbling Vireo in Michigan is projected to fall about 30% by 2030 — from 3.7 in 2025 to a central estimate of 2.6 (95% range 1.2–4.0). A 5-year backtest shows a typical error of ±27%, with 100% of held-out values landing inside the 95% band.

-30%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 →
2.6Projected 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 →
1.2–4.095% 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 →
±27%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, Warbling Vireo in Michigan is projected to fall about 30% by 2030 — from 3.7 in 2025 to a central estimate of 2.6 (95% range 1.2–4.0). A 5-year backtest shows a typical error of ±27%, 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 →
20262.71.34.1
20272.71.34.0
20282.61.34.0
20292.61.24.0
20302.61.24.0

Warbling Vireo Survey Routes in Michigan

Routes recording Warbling Vireo 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 →
Coopersville1920251979
Richmond1320242000
Chippewa Lk.1320251993
No Bradley1120251970
Prattville1120211967
Adair1119951977
Cohoctah1120252021
New Buffalo1020141992
Nashville920251968
Mottville920251967
Ola920251974
Remus820251974
Juniata820241969
Belding 2820252004
Lawrence720251969
Pleasant Val719971967
Bell Oak720081966
Cathro720161971
Tyre719961967
Herron720162016
New Troy620241971
Tahquamenon620051980
Galesburg620251966
Holt620251969
S Lyons619921967

Warbling Vireo Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawareidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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