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Species · Tennessee · BBS 2026 Release · 1966–2025

Warbling Vireo Population Trend in Tennessee

All statesForest birds

Warbling Vireo in Tennessee has surged: up 470% on the route-weighted index since 1968.

+470%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 →
28Routes 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 TennesseeNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Warbling Vireo has surged in Tennessee: up 470% on the route-weighted index since 1968.

Warbling Vireo Population Forecast in Tennessee

If the recent trend holds, Warbling Vireo in Tennessee is projected to rise about 32% by 2030 — from 0.45 in 2025 to a central estimate of 0.59 (95% range 0.20–0.98). A 5-year backtest shows a typical error of ±241.4%, with 40% of held-out values landing inside the 95% band.

+32%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 →
0.59Projected 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 →
0.20–0.9895% 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 →
±241.4%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, Warbling Vireo in Tennessee is projected to rise about 32% by 2030 — from 0.45 in 2025 to a central estimate of 0.59 (95% range 0.20–0.98). A 5-year backtest shows a typical error of ±241.4%, with 40% 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 →
20260.570.180.96
20270.580.180.97
20280.580.190.97
20290.590.200.98
20300.590.200.98

Warbling Vireo Survey Routes in Tennessee

Routes recording Warbling Vireo in Tennessee.
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 →
Pawpaw420101972
Tiptonville320251967
Big Sandy220251986
Belotes Bend220001968
Petersburg220121968
Allens Brdge220222022
Indian Mound 2220182010
Moscow120222003
Brownsville119931972
Tibbs120252025
Whiteville120231966
Mansfield120251999
Sweetlips119971997
Silerton120021974
Trenton120232005
Humboldt120251971
Pond Creek120001969
Indian Mound119851980
Collinwood120241986
Wrigley120211977
Campbellsville120171986
Lewis Forest120122012
White House120181968
Peytonsville120112006
Bradyville120031973

Warbling Vireo Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawareidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-dakotatexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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