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Species · Michigan · BBS 2025 Release · 1966–2024

Warbling Vireo Population Trend in Michigan

All statesForest birds

Warbling Vireo in Michigan has held roughly steady: up 9% on the route-weighted index since 1968.

+9%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 →
95Routes 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 →
58YearsYears 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 24% by 2029 — from 3.3 in 2024 to a central estimate of 2.5 (95% range 1.2–3.9). A 5-year backtest shows a typical error of ±21.1%, with 100% of held-out values landing inside the 95% band.

-24%Change by 2029TrendPercent 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 →
2.5Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
1.2–3.995% 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 →
±21.1%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 24% by 2029 — from 3.3 in 2024 to a central estimate of 2.5 (95% range 1.2–3.9). A 5-year backtest shows a typical error of ±21.1%, with 100% of held-out values landing inside the 95% band.19662029
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 →
20252.61.34.0
20262.61.24.0
20272.61.23.9
20282.61.23.9
20292.51.23.9

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 →
Coopersville1420241979
Richmond1320242000
Galesburg1120241966
Prattville1120211967
Adair1119951977
Chippewa Lk.1120241993
New Buffalo1020141992
Mottville920241967
Holt920241969
Juniata820241969
Lawrence720241969
Pleasant Val719971967
Bell Oak720081966
Cathro720161971
Tyre719961967
Herron720162016
New Troy620241971
Tahquamenon620051980
Howardsville620241969
Remus620241974
No Bradley620241970
S Lyons619921967
Drayton Plns619871973
Bear Lake520241967
Hubbard Lake519961975

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 2026-05-22.