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Species · BCR 20 · BBS 2026 Release · 1966–2025

Bell's Vireo In Edwards Plateau

All regionsEdwards PlateauForest birds

Bell's Vireo in Edwards Plateau 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 →
19Routes In RegionSurvey 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 SignalsNotable 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 Edwards Plateau: up 212% on the route-weighted index since 1969.

Bell's Vireo In Edwards Plateau Population Forecast

If the recent trend holds, Bell's Vireo in Edwards Plateau is projected to stay roughly flat through 2030, near 21 (95% range 13–29). A 5-year backtest shows a typical error of ±16%, with 80% of held-out values landing inside the 95% band.

-4%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 →
21Projected 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 →
13–2995% 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 →
±16%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 Edwards Plateau is projected to stay roughly flat through 2030, near 21 (95% range 13–29). A 5-year backtest shows a typical error of ±16%, with 80% 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 →
2026201328
2027201328
2028211328
2029211328
2030211329

Routes In Edwards Plateau

Routes recording Bell's Vireo in Edwards Plateau.
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 →
RockspringTEXAS562025
HarperTEXAS512025
San SabaTEXAS482025
MontellTEXAS432025
Valley SpgsTEXAS392025
Allen CreekTEXAS272025
Prairie Mtn.TEXAS252025
Indian MtnTEXAS192025
AdamsvilleTEXAS172025
LeakeyTEXAS92025
UtopiaTEXAS72025
Pidcoke 2TEXAS42025
BoerneTEXAS32025
GeorgetownTEXAS31967
FitzhughTEXAS31983
KempnerTEXAS32025
PidcokeTEXAS12009
Dripping SpgTEXAS12023
LeanderTEXAS11994

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