BirdAnalyst
Species · BCR 22 · BBS 2025 Release · 1966–2024

Red-eyed Vireo In Eastern Tallgrass Prairie

All regionsEastern Tallgrass PrairieForest birds

Red-eyed Vireo in Eastern Tallgrass Prairie has surged: up 75% on the route-weighted index since 1968.

+75%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 →
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 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 Eastern Tallgrass Prairie: up 75% 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 fall about 14% by 2029 — from 1.7 in 2024 to a central estimate of 1.5 (95% range 1.1–1.9). A 5-year backtest shows a typical error of ±23.1%, with 20% of held-out values landing inside the 95% band.

-14%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 →
1.5Projected 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 →
1.1–1.995% 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 →
±23.1%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 fall about 14% by 2029 — from 1.7 in 2024 to a central estimate of 1.5 (95% range 1.1–1.9). A 5-year backtest shows a typical error of ±23.1%, with 20% of held-out values landing inside the 95% band.19662029
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 →
20251.41.01.8
20261.41.01.8
20271.41.01.8
20281.51.11.9
20291.51.11.9

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
OlsburgKANSAS142024
BelleviewILLINOIS112024
WallaceINDIANA112024
LincolnvilleKANSAS112024
DoverKANSAS82022
MoselleMISSOURI82024
AthensILLINOIS72024
OlatheKANSAS72021
SeveranceKANSAS72024
SticklervillMISSOURI72024
Mascoutah LkILLINOIS62024
New CastleINDIANA62024
McfallMISSOURI62024
LucerneMISSOURI62021
FultonOHIO62024
W CarrolltonOHIO62015
Harveysburg 2OHIO62024
River FallsWISCONSIN62024
BrookvilleINDIANA52024
WashtaIOWA52014
EllinorKANSAS52024
GrantvilleKANSAS52022
Le LoupKANSAS52021
New PointMISSOURI52024

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