BirdAnalyst
Species · BCR 10 · BBS 2025 Release · 1966–2024

Red-eyed Vireo In Northern Rockies

All regionsNorthern RockiesForest birds

Red-eyed Vireo in Northern Rockies has declined: down 47% on the route-weighted index since 1970.

-47%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 →
71Routes 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 →

No notable trend signals for Red-eyed Vireo in Northern Rockies. See the full index history below.

Forecast

If the recent trend holds, Red-eyed Vireo in Northern Rockies is projected to fall about 100% by 2029 — from 0.64 in 2024 to a central estimate of 0.00 (95% range 0.00–1.1). A 5-year backtest shows a typical error of ±98.1%, with 100% 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 →
0.00–1.195% 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 →
±98.1%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 Northern Rockies is projected to fall about 100% by 2029 — from 0.64 in 2024 to a central estimate of 0.00 (95% range 0.00–1.1). A 5-year backtest shows a typical error of ±98.1%, 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 →
20250.070.001.1
20260.050.001.1
20270.020.001.1
20280.000.001.1
20290.000.001.1

Routes In Northern Rockies

Routes recording Red-eyed Vireo in Northern Rockies.
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 →
NaplesIDAHO142024
Libby DamMONTANA122024
NezperceIDAHO102012
Fish CreekMONTANA102024
Swan LakeMONTANA102024
NorthportWASHINGTON92024
NinemileMONTANA72024
Twin LakesWASHINGTON62024
Whitefish LakeMONTANA52024
Marble CreekIDAHO41992
Hells CanyonOREGON42022
KellerWASHINGTON42007
L Pend O NwrWASHINGTON42024
MivodenIDAHO32023
GoldenIDAHO31995
CoolinIDAHO32023
NewbridgeOREGON32024
CusickWASHINGTON32024
Hunter PeakWYOMING32010
AlpineWYOMING31980
CabartonIDAHO22015
Yellow PineIDAHO21993
WoodmanMONTANA22024
Red RockMONTANA21975
NoxonMONTANA22023

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