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

Red-eyed Vireo Population Trend in Oregon

All statesForest birds

Red-eyed Vireo in Oregon has collapsed: down 81% on the route-weighted index since 1971.

-81%Since 1971TrendPercent 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 →
21Routes 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 →
54YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Red-eyed Vireo Trends in OregonNotable 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 Oregon: down 81% on the route-weighted index since 1971.

Red-eyed Vireo Population Forecast in Oregon

If the recent trend holds, Red-eyed Vireo in Oregon is projected to fall about 100% by 2029 — from 0.13 in 2024 to a central estimate of 0.00 (95% range 0.00–0.35). A 5-year backtest shows a typical error of ±169.7%, 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 →
0.00–0.3595% 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 →
±169.7%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, Red-eyed Vireo in Oregon is projected to fall about 100% by 2029 — from 0.13 in 2024 to a central estimate of 0.00 (95% range 0.00–0.35). A 5-year backtest shows a typical error of ±169.7%, 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 →
20250.000.000.35
20260.000.000.35
20270.000.000.35
20280.000.000.35
20290.000.000.35

Red-eyed Vireo Survey Routes in Oregon

Routes recording Red-eyed Vireo in Oregon.
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 →
Imnaha820241968
Hells Canyon420221992
Newbridge320242024
Shellrock219941994
Sandy River219991995
Flora220232017
Waldport219991997
Timber119751968
Tualatin119761976
Ochoco119751972
Logdell119941988
Winberry119901971
Wedderburn119941982
Modoc Point119841971
Scio119961981
Joseph120081972
Pendleton120111979
Mount Vernon120152004
Elkton120242007
Badger Creek120182018
Twickenham120232022

Red-eyed Vireo Population Trend in Other States

alabamaalaskaarkansascoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawashingtonwest-virginiawisconsinwyoming

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