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Species · Nebraska · BBS 2026 Release · 1966–2025

Bell's Vireo Population Trend in Nebraska

All statesForest birds

Bell's Vireo in Nebraska has surged: up 360% on the route-weighted index since 1969.

+360%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 →
64Routes 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 Bell's 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 →

Bell's Vireo has surged in Nebraska: up 360% on the route-weighted index since 1969.

Bell's Vireo Population Forecast in Nebraska

If the recent trend holds, Bell's Vireo in Nebraska is projected to rise about 20% by 2030 — from 1.2 in 2025 to a central estimate of 1.5 (95% range 0.93–2.0). A 5-year backtest shows a typical error of ±8.5%, with 100% of held-out values landing inside the 95% band.

+20%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 →
1.5Projected 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 →
0.93–2.095% 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 →
±8.5%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, Bell's Vireo in Nebraska is projected to rise about 20% by 2030 — from 1.2 in 2025 to a central estimate of 1.5 (95% range 0.93–2.0). A 5-year backtest shows a typical error of ±8.5%, with 100% 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 →
20261.40.831.9
20271.40.862.0
20281.40.882.0
20291.50.902.0
20301.50.932.0

Bell's Vireo Survey Routes in Nebraska

Routes recording Bell's 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 →
Brady2020251980
Almeria820211972
Hendley820252018
Liberty 3720252009
Paxton520161985
Berwyn520091993
Bartley420251980
Eagle Creek420251969
Boelus420222022
Stratton320252002
Table320222003
Nenzel320252018
Crookston320252018
Oglala Nat. Grass.320022000
Ponca320192018
Liberty 2320072004
Liberty220031967
Kearney220251971
Holbrook220241979
Surprise220241968
Bartlett219671967
Midway220252016
Berea219831981
Hampton220252018
Berwyn 2220252014

Bell's Vireo Population Trend in Other States

arizonaarkansascaliforniacoloradoillinoisindianaiowakansaskentuckymichiganminnesotamissourinevadanew-mexiconorth-dakotaohiooklahomasouth-dakotatexasutahwisconsin

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