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Species · Ohio · BBS 2025 Release · 1966–2024

Warbling Vireo Population Trend in Ohio

All statesForest birds

Warbling Vireo in Ohio has edged down: down 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 →
87Routes 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 OhioNotable 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 Ohio. See the full index history below.

Warbling Vireo Population Forecast in Ohio

If the recent trend holds, Warbling Vireo in Ohio is projected to rise about 17% by 2029 — from 1.5 in 2024 to a central estimate of 1.7 (95% range 0.89–2.6). A 5-year backtest shows a typical error of ±19.8%, with 80% of held-out values landing inside the 95% band.

+17%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 →
1.7Projected 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 →
0.89–2.695% 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 →
±19.8%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 Ohio is projected to rise about 17% by 2029 — from 1.5 in 2024 to a central estimate of 1.7 (95% range 0.89–2.6). A 5-year backtest shows a typical error of ±19.8%, with 80% 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 →
20251.80.932.6
20261.80.922.6
20271.70.912.6
20281.70.902.6
20291.70.892.6

Warbling Vireo Survey Routes in Ohio

Routes recording Warbling Vireo in Ohio.
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 →
Bismark1019951967
Wilmington919961966
Pittsfield820241992
Kenton820131966
West Elkton720121992
Kunkle620241992
Botkins620181992
Adamsville619891971
Napoleon520241972
Troy519961966
Harveysburg519961966
Omega520241966
Bloomville420241994
Graytown419841966
Middlefield420171967
Kalida420181969
Marion420231966
Fulton420241966
Smithfield420231972
Cumberland420171966
Ashley420181988
Stonecreek420241996
Kingsway320241966
Darrtown320211966
Xenia320171966

Warbling Vireo Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawareidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaoklahomaoregonpennsylvaniarhode-islandsouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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