BirdAnalyst
Species · BCR 23 · BBS 2025 Release · 1966–2024

Red-eyed Vireo In Prairie Hardwood Transition

All regionsPrairie Hardwood TransitionForest birds

Red-eyed Vireo in Prairie Hardwood Transition has surged: up 125% on the route-weighted index since 1968.

+125%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 →
161Routes 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 Prairie Hardwood Transition: up 125% on the route-weighted index since 1968.

Forecast

If the recent trend holds, Red-eyed Vireo in Prairie Hardwood Transition is projected to rise about 41% by 2029 — from 7.2 in 2024 to a central estimate of 10 (95% range 7.9–12). A 5-year backtest shows a typical error of ±25.4%, with 80% of held-out values landing inside the 95% band.

+41%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 →
10Projected 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 →
7.9–1295% 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 →
±25.4%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 Prairie Hardwood Transition is projected to rise about 41% by 2029 — from 7.2 in 2024 to a central estimate of 10 (95% range 7.9–12). A 5-year backtest shows a typical error of ±25.4%, with 80% 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 →
20259.77.512
20269.97.612
202710.07.712
2028107.812
2029107.912

Routes In Prairie Hardwood Transition

Routes recording Red-eyed Vireo in Prairie Hardwood Transition.
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 →
GreshamWISCONSIN622024
Oconto FallsWISCONSIN402023
Stevens PtWISCONSIN372023
Pigeon CreekWISCONSIN332024
HungerfordMICHIGAN312024
CumberlandWISCONSIN312024
CadottWISCONSIN302024
MontereyMICHIGAN282024
HatfieldWISCONSIN281998
ScottvilleMICHIGAN272024
EvergreenMINNESOTA262024
MatherWISCONSIN242023
Wis RapidsWISCONSIN212023
PrincetonWISCONSIN202024
Barry S.G.A.MICHIGAN192012
MerrillWISCONSIN192024
RemusMICHIGAN182024
Brook ParkMINNESOTA172024
SaxevilleWISCONSIN172024
GrimmsWISCONSIN172021
BravoMICHIGAN162023
Chippewa Lk.MICHIGAN162024
UnityWISCONSIN162024
LoraineWISCONSIN152021
CascoWISCONSIN152024

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