BirdAnalyst
Species · Nevada · BBS 2025 Release · 1966–2024

Warbling Vireo Population Trend in Nevada

All statesForest birds

Warbling Vireo in Nevada has held roughly steady: down 6% on the route-weighted index since 1979.

-6%Since 1979TrendPercent 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 →
26Routes 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 →
37YearsYears 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 NevadaNotable 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 Nevada. See the full index history below.

Warbling Vireo Population Forecast in Nevada

If the recent trend holds, Warbling Vireo in Nevada is projected to rise about 128% by 2029 — from 0.46 in 2024 to a central estimate of 1.1 (95% range 0.00–2.3). A 5-year backtest shows a typical error of ±210.7%, with 100% of held-out values landing inside the 95% band.

+128%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 →
1.1Projected 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 →
0.00–2.395% 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 →
±210.7%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 Nevada is projected to rise about 128% by 2029 — from 0.46 in 2024 to a central estimate of 1.1 (95% range 0.00–2.3). A 5-year backtest shows a typical error of ±210.7%, with 100% of held-out values landing inside the 95% band.19682029
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 →
20251.00.002.2
20261.00.002.2
20271.00.002.3
20281.00.002.3
20291.10.002.3

Warbling Vireo Survey Routes in Nevada

Routes recording Warbling Vireo in Nevada.
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 →
Austin3720182008
Humboldt Nf 21020242021
Carson River920022001
Humboldt Nf820191993
Jarbidge720151997
Hawthorne720011997
Comins Lake520162005
Dinner Sta319931968
Meadow Vally320232023
Sheldon Nwr220022002
Ruby Valley 2220192004
Ruby Valley220001997
Nixon220091978
Charleston Reservoir220242024
Sand Pass120101996
Walker Can119681968
Ash Meadows120021995
Virgin Creek120181995
Toiyabe Nf120172014
Majors Place119891989
Gardnerville120032003
Willis120211988
Minerva119891989
Beatty120072007
Fallon120002000

Warbling Vireo Population Trend in Other States

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

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