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Species · Kansas · BBS 2025 Release · 1966–2024

Red-eyed Vireo Population Trend in Kansas

All statesForest birds

Red-eyed Vireo in Kansas has surged: up 21× on the route-weighted index since 1969.

21×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 →
57YearsYears 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 21× 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 39% by 2029 — from 3.7 in 2024 to a central estimate of 2.2 (95% range 1.2–3.3). A 5-year backtest shows a typical error of ±47.2%, with 20% of held-out values landing inside the 95% band.

-39%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 →
2.2Projected 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 →
1.2–3.395% 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 →
±47.2%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 39% by 2029 — from 3.7 in 2024 to a central estimate of 2.2 (95% range 1.2–3.3). A 5-year backtest shows a typical error of ±47.2%, with 20% of held-out values landing inside the 95% band.19672029
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 →
20252.11.03.1
20262.11.13.2
20272.21.13.2
20282.21.23.3
20292.21.23.3

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
Olsburg1420242000
Lincolnville1120242002
Buckeye920231967
Covert920241974
Dover820221980
Olathe720211970
Severance720242000
Dalton520241975
Ellinor520241987
Grantville520221973
Hanover520231989
Le Loup520212002
Seneca420221977
Minneapolis420191990
Trading Post420242004
Barclay320241968
Rock Creek320211968
Beloit 2320182006
Jamestown320242000
Longton320211988
Melrose220231969
Humboldt220221997
Jewell 2220212006
Wellington220241991

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 2026-05-22.