BirdAnalyst
Species · BCR 19 · BBS 2026 Release · 1966–2025

Red-eyed Vireo In Central Mixed Grass Prairie

All regionsCentral Mixed Grass PrairieForest birds

Red-eyed Vireo in Central Mixed Grass Prairie has surged: up 799% on the route-weighted index since 1969.

+799%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 →
77Routes 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 →
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 SignalsNotable 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 Central Mixed Grass Prairie: up 799% on the route-weighted index since 1969.

Red-eyed Vireo In Central Mixed Grass Prairie Population Forecast

If the recent trend holds, Red-eyed Vireo in Central Mixed Grass Prairie is projected to stay roughly flat through 2030, near 0.91 (95% range 0.53–1.3). A 5-year backtest shows a typical error of ±18.6%, with 100% of held-out values landing inside the 95% band.

-8%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 →
0.91Projected 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 →
0.53–1.395% 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 →
±18.6%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 Central Mixed Grass Prairie is projected to stay roughly flat through 2030, near 0.91 (95% range 0.53–1.3). A 5-year backtest shows a typical error of ±18.6%, with 100% 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 →
20260.840.461.2
20270.860.481.2
20280.880.491.3
20290.890.511.3
20300.910.531.3

Routes In Central Mixed Grass Prairie

Routes recording Red-eyed Vireo in Central Mixed Grass Prairie.
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 →
Red CloudNEBRASKA102024
BuckeyeKANSAS92023
KanopolisKANSAS92025
HanoverKANSAS92025
DaltonKANSAS62025
Wichita Mtns EastOKLAHOMA62025
WellingtonKANSAS52025
BradyNEBRASKA52025
MinneapolisKANSAS42019
AlmeriaNEBRASKA42021
NenzelNEBRASKA42025
HollenbergKANSAS32025
Beloit 2KANSAS32018
Liberty 3NEBRASKA32025
JamestownKANSAS22025
HendleyNEBRASKA22024
HamptonNEBRASKA22023
PhrosoOKLAHOMA22025
Ft Sill EastOKLAHOMA21994
Wichita Mts WestOKLAHOMA22025
Wichita MtnsOKLAHOMA21994
St JohnKANSAS12014
CoatsKANSAS12024
ColdwaterKANSAS12022
AshlandKANSAS12005

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