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Species · Kansas · BBS 2026 Release · 1966–2025

Red-eyed Vireo Population Trend in Kansas

All statesForest birds

Red-eyed Vireo in Kansas has surged: up 22× on the route-weighted index since 1969.

22×Since 1969TrendPercent 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 →
51Routes 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 →
58YearsYears 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 KansasNotable 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 Kansas: up 22× on the route-weighted index since 1969.

Red-eyed Vireo Population Forecast in Kansas

If the recent trend holds, Red-eyed Vireo in Kansas is projected to fall about 13% by 2030 — from 2.7 in 2025 to a central estimate of 2.3 (95% range 1.3–3.4). A 5-year backtest shows a typical error of ±53.1%, with 0% of held-out values landing inside the 95% band.

-13%Change by 2030TrendPercent 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 →
2.3Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
1.3–3.495% 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 →
±53.1%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 Kansas is projected to fall about 13% by 2030 — from 2.7 in 2025 to a central estimate of 2.3 (95% range 1.3–3.4). A 5-year backtest shows a typical error of ±53.1%, with 0% of held-out values landing inside the 95% band.19672030
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 →
20262.21.13.2
20272.21.23.3
20282.21.23.3
20292.31.23.3
20302.31.33.4

Red-eyed Vireo Survey Routes in Kansas

Routes recording Red-eyed Vireo in Kansas.
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 →
Wreford2320241967
Lincolnville1120242002
Olsburg1120252000
Buckeye920231967
Kanopolis920251985
Hanover920251989
Dover820221980
Olathe720211970
Ellinor720251987
Dalton620251975
Wellington520251991
Grantville520221973
Le Loup520212002
Seneca420221977
Minneapolis420191990
Trading Post420252004
Rock Creek320211968
Hollenberg320251975
Beloit 2320182006
Bucyrus320252022
Morehead320252002
Reece320252000
Severance320252000
Longton320211988
Melrose220231969

Red-eyed Vireo Population Trend in Other States

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

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.