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

Red-eyed Vireo Population Trend in Idaho

All statesForest birds

Red-eyed Vireo in Idaho has surged: up 148% on the route-weighted index since 1971.

+148%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 →
22Routes 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 IdahoNotable 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 →

Red-eyed Vireo has surged in Idaho: up 148% on the route-weighted index since 1971.

Red-eyed Vireo Population Forecast in Idaho

If the recent trend holds, Red-eyed Vireo in Idaho is projected to fall about 100% by 2029 — from 0.56 in 2024 to a central estimate of 0.00 (95% range 0.00–3.0). A 5-year backtest shows a typical error of ±172.1%, 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 →
0.00–3.095% 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 →
±172.1%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 Idaho is projected to fall about 100% by 2029 — from 0.56 in 2024 to a central estimate of 0.00 (95% range 0.00–3.0). A 5-year backtest shows a typical error of ±172.1%, 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 →
20250.000.003.0
20260.000.003.0
20270.000.003.0
20280.000.003.0
20290.000.003.0

Red-eyed Vireo Survey Routes in Idaho

Routes recording Red-eyed Vireo in Idaho.
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 →
Naples1420241972
Nezperce1020121969
Marble Creek419921990
Mivoden320231977
Golden319951993
Springfield319811976
Coolin320231986
Squirrel219941994
Yellow Pine219931993
Cabarton220151992
Avery120191990
Gifford120171971
Lolo Pass120011992
N Fork Cda R120181993
Rochat Divde120231993
Centerville120071995
Alturas119681968
Joel119911991
Pierce119941992
Salmon River120211988
Burgdorf120001996
Featherville120001989

Red-eyed Vireo Population Trend in Other States

alabamaalaskaarkansascoloradoconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawashingtonwest-virginiawisconsinwyoming

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