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Species · Nebraska · BBS 2026 Release · 1966–2025

Warbling Vireo Population Trend in Nebraska

All statesForest birds

Warbling Vireo in Nebraska has surged: up 213% on the route-weighted index since 1969.

+213%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 →
66Routes 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 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 213% 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 stay roughly flat through 2030, near 3.7 (95% range 2.6–4.8). A 5-year backtest shows a typical error of ±20.7%, with 40% of held-out values landing inside the 95% band.

-3%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 →
3.7Projected 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 →
2.6–4.895% 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 →
±20.7%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 stay roughly flat through 2030, near 3.7 (95% range 2.6–4.8). A 5-year backtest shows a typical error of ±20.7%, with 40% of held-out values landing inside the 95% band.19672030
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 →
20263.52.44.6
20273.62.54.7
20283.62.54.7
20293.72.64.8
20303.72.64.8

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 →
Murdock2120252018
Midway1820251967
Surprise1320251971
Gretna 21220252019
Red Cloud1120242018
Sumner1020251967
Gretna1020181969
Hampton1020252018
Humboldt1020252018
Chambers920252023
Johnson820251974
Kearney820251968
Almeria820211969
Tilden820252019
Kenesaw720251968
Eagle Creek720251967
Boelus720222022
Bassett620252018
Bartley520252003
Richland520251968
Sparta520251967
Ponca520252018
Liberty 3520252009
Berwyn 2520252014
Liberty420031967

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 2026-08-14.