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Species · BCR 9 · BBS 2025 Release · 1966–2024

Hutton's Vireo In Great Basin

All regionsGreat BasinForest birds

Hutton's Vireo in Great Basin has edged down: down 24% on the route-weighted index since 1983.

-24%Since 1983TrendPercent 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 →
10Routes 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 →
25YearsYears 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 →

No notable trend signals for Hutton's Vireo in Great Basin. See the full index history below.

Hutton's Vireo In Great Basin Population Forecast

If the recent trend holds, Hutton's Vireo in Great Basin is projected to stay roughly flat through 2027, near 0.01 (95% range 0.00–0.03). A 5-year backtest shows a typical error of ±17.5%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2027TrendPercent 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 →
0.01Projected 2027 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.0395% 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 →
±17.5%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, Hutton's Vireo in Great Basin is projected to stay roughly flat through 2027, near 0.01 (95% range 0.00–0.03). A 5-year backtest shows a typical error of ±17.5%, with 100% of held-out values landing inside the 95% band.19752027
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 →
20230.010.000.03
20240.010.000.03
20250.010.000.03
20260.010.000.03
20270.010.000.03

Routes In Great Basin

Routes recording Hutton's Vireo in Great Basin.
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 →
Mt HoodOREGON22022
Suiattle RivWASHINGTON22017
BartleCALIFORNIA12017
NewhalemWASHINGTON12019
SnowdenWASHINGTON12018
KendallWASHINGTON12021
White ChuckWASHINGTON11999
ConcreteWASHINGTON12017
Index 2WASHINGTON12018
E. Mt. AdamsWASHINGTON12010

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