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

Red-eyed Vireo In Great Basin

All regionsGreat BasinForest birds

Red-eyed Vireo in Great Basin has collapsed: down 91% on the route-weighted index since 1970.

-91%Since 1970TrendPercent 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 →
38Routes 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 →
56YearsYears 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 declinecomputed 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 →

Red-eyed Vireo has collapsed in Great Basin: down 90% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Red-eyed Vireo in Great Basin is projected to fall about 100% by 2029 — from 0.25 in 2024 to a central estimate of 0.00 (95% range 0.00–0.83). A 5-year backtest shows a typical error of ±285.6%, with 60% of held-out values landing inside the 95% band.

-100%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 →
0.00Projected 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 →
0.00–0.8395% 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 →
±285.6%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, Red-eyed Vireo in Great Basin is projected to fall about 100% by 2029 — from 0.25 in 2024 to a central estimate of 0.00 (95% range 0.00–0.83). A 5-year backtest shows a typical error of ±285.6%, with 60% 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 →
20250.000.000.83
20260.000.000.83
20270.000.000.83
20280.000.000.83
20290.000.000.83

Routes In Great Basin

Routes recording Red-eyed 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 →
NewhalemWASHINGTON102024
IndexWASHINGTON101971
ImnahaOREGON82024
KendallWASHINGTON62024
L. WenatcheeWASHINGTON52024
TwispWASHINGTON42024
SpringfieldIDAHO31981
SquirrelIDAHO21994
ArdenvoirWASHINGTON21985
GlacierWASHINGTON22001
TonasketWASHINGTON22010
WilburWASHINGTON21990
MaldenWASHINGTON22022
Suiattle RivWASHINGTON22019
MazamaWASHINGTON22019
ConcreteWASHINGTON22024
GiffordIDAHO12017
JoelIDAHO11991
Modoc PointOREGON11984
JosephOREGON12008
PendletonOREGON12011
Badger CreekOREGON12018
ReardanWASHINGTON12013
RimrockWASHINGTON12012
SnowdenWASHINGTON12009

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