BirdAnalyst
Species · BCR 12 · BBS 2025 Release · 1966–2024

Red-eyed Vireo In Boreal Hardwood Transition

All regionsBoreal Hardwood TransitionForest birds

Red-eyed Vireo in Boreal Hardwood Transition has surged: up 137% on the route-weighted index since 1968.

+137%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 →
127Routes 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 Boreal Hardwood Transition: up 137% on the route-weighted index since 1968.

Forecast

If the recent trend holds, Red-eyed Vireo in Boreal Hardwood Transition is projected to stay roughly flat through 2029, near 55 (95% range 49–61). A 5-year backtest shows a typical error of ±10.2%, with 60% of held-out values landing inside the 95% band.

+3%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 →
55Projected 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 →
49–6195% 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 →
±10.2%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 Boreal Hardwood Transition is projected to stay roughly flat through 2029, near 55 (95% range 49–61). A 5-year backtest shows a typical error of ±10.2%, with 60% 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 →
2025534759
2026544760
2027544860
2028554861
2029554961

Routes In Boreal Hardwood Transition

Routes recording Red-eyed Vireo in Boreal 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 →
CavourWISCONSIN1172024
Crystal FlsMICHIGAN1132024
Ned LakeMICHIGAN1122024
Eagle RiverWISCONSIN1072024
BabbittMINNESOTA1032023
Union TwpWISCONSIN992024
JordanMINNESOTA972023
Land O LakesWISCONSIN912016
Land O' Lakes 2WISCONSIN912024
MellenWISCONSIN912024
ConoverWISCONSIN902024
Popple RiverWISCONSIN862024
SidnawMICHIGAN842024
Washington IWISCONSIN842024
LockportMINNESOTA832024
Red LakeMINNESOTA832024
AmbergWISCONSIN802024
Sherry LakeMINNESOTA782022
ShanagoldenWISCONSIN772024
BenaMINNESOTA761977
Big Island LakeMICHIGAN752010
Crane LakeMINNESOTA732024
BigforkMINNESOTA722024
BlackduckMINNESOTA692022
WausaukeeWISCONSIN692024

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