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Species · Nebraska · BBS 2025 Release · 1966–2024

Warbling Vireo Population Trend in Nebraska

All statesForest birds

Warbling Vireo in Nebraska has surged: up 223% on the route-weighted index since 1969.

+223%Since 1969TrendPercent 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 →
65Routes 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 →
57YearsYears 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 NebraskaNotable 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 Nebraska: up 223% on the route-weighted index since 1969.

Warbling Vireo Population Forecast in Nebraska

If the recent trend holds, Warbling Vireo in Nebraska is projected to rise about 14% by 2029 — from 3.2 in 2024 to a central estimate of 3.6 (95% range 2.5–4.7). A 5-year backtest shows a typical error of ±19.8%, with 40% of held-out values landing inside the 95% band.

+14%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 →
3.6Projected 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 →
2.5–4.795% 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 Nebraska is projected to rise about 14% by 2029 — from 3.2 in 2024 to a central estimate of 3.6 (95% range 2.5–4.7). A 5-year backtest shows a typical error of ±19.8%, with 40% of held-out values landing inside the 95% band.19672029
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 →
20253.52.44.6
20263.52.44.6
20273.52.54.6
20283.62.54.7
20293.62.54.7

Warbling Vireo Survey Routes in Nebraska

Routes recording Warbling Vireo in Nebraska.
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 →
Midway1620231967
Kearney1320241968
Chambers1220232023
Murdock1220242018
Red Cloud1120242018
Belvidere1020241993
Gretna1020181969
Wheeler Co920241979
Almeria820211969
Eagle Creek820241967
Gretna 2820242019
Sumner720241967
Surprise720241971
Tilden720242019
Boelus720222022
Ponca620242018
Hampton620242018
Humboldt620242018
Kenesaw520241968
Johnson420241974
Liberty420031967
Bartley420242003
Winside420031975
Swan Lake420231969
Liberty 2420072004

Warbling Vireo Population Trend in Other States

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

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