BirdAnalyst
Species · BCR 22 · BBS 2026 Release · 1966–2025

Red-eyed Vireo In Eastern Tallgrass Prairie

All regionsEastern Tallgrass PrairieForest birds

Red-eyed Vireo in Eastern Tallgrass Prairie has risen sharply: up 68% on the route-weighted index since 1968.

+68%Since 1968TrendPercent 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 →
270Routes 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 →
59YearsYears 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 risen sharply in Eastern Tallgrass Prairie: up 67% on the route-weighted index since 1968.

Red-eyed Vireo In Eastern Tallgrass Prairie Population Forecast

If the recent trend holds, Red-eyed Vireo in Eastern Tallgrass Prairie is projected to stay roughly flat through 2030, near 1.5 (95% range 1.1–1.9). A 5-year backtest shows a typical error of ±25.1%, with 20% of held-out values landing inside the 95% band.

-1%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 →
1.5Projected 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 →
1.1–1.995% 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 →
±25.1%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 Eastern Tallgrass Prairie is projected to stay roughly flat through 2030, near 1.5 (95% range 1.1–1.9). A 5-year backtest shows a typical error of ±25.1%, with 20% of held-out values landing inside the 95% band.19662030
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 →
20261.41.01.8
20271.41.11.9
20281.51.11.9
20291.51.11.9
20301.51.11.9

Routes In Eastern Tallgrass Prairie

Routes recording Red-eyed Vireo in Eastern Tallgrass 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 →
WrefordKANSAS232024
BelleviewILLINOIS142025
WallaceINDIANA112024
LincolnvilleKANSAS112024
OlsburgKANSAS112025
DoverKANSAS82022
New PointMISSOURI82025
OlatheKANSAS72021
EllinorKANSAS72025
House SpringsMISSOURI72025
Harveysburg 2OHIO72025
River FallsWISCONSIN72025
EubanksILLINOIS62025
New CastleINDIANA62024
FilleyMISSOURI62025
MoselleMISSOURI62025
W CarrolltonOHIO62015
RaymondWISCONSIN62025
MiddletownINDIANA52025
WashtaIOWA52014
GrantvilleKANSAS52022
Le LoupKANSAS52021
KearneyMISSOURI52025
UnionMISSOURI51999
BloomvilleOHIO52025

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