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Species · BCR 12 · BBS 2026 Release · 1966–2025

Yellow-throated Vireo In Boreal Hardwood Transition

All regionsBoreal Hardwood TransitionForest birds

Yellow-throated Vireo in Boreal Hardwood Transition has surged: up 193% on the route-weighted index since 1968.

+193%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 →
98Routes 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 →

Yellow-throated Vireo has surged in Boreal Hardwood Transition: up 193% on the route-weighted index since 1968.

Yellow-throated Vireo In Boreal Hardwood Transition Population Forecast

If the recent trend holds, Yellow-throated Vireo in Boreal Hardwood Transition is projected to fall about 30% by 2030 — from 1.4 in 2025 to a central estimate of 0.97 (95% range 0.62–1.3). A 5-year backtest shows a typical error of ±19.8%, with 80% of held-out values landing inside the 95% band.

-30%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 →
0.97Projected 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 →
0.62–1.395% 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 →
±19.8%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, Yellow-throated Vireo in Boreal Hardwood Transition is projected to fall about 30% by 2030 — from 1.4 in 2025 to a central estimate of 0.97 (95% range 0.62–1.3). A 5-year backtest shows a typical error of ±19.8%, with 80% 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 →
20260.940.591.3
20270.950.601.3
20280.950.611.3
20290.960.611.3
20300.970.621.3

Routes In Boreal Hardwood Transition

Routes recording Yellow-throated 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 →
BashawWISCONSIN142025
AmbergWISCONSIN122025
NebishMINNESOTA72025
Union TwpWISCONSIN72025
TahquamenonMICHIGAN62002
Wigwam BayMINNESOTA62023
DebsMINNESOTA62025
Tamarac NwrMINNESOTA62023
CromwellMINNESOTA52025
GilmanWISCONSIN52025
WausaukeeWISCONSIN52025
Weirgor SpringsWISCONSIN52025
Crystal FlsMICHIGAN42025
HarriettaMICHIGAN42025
BrainerdMINNESOTA42024
Bear LakeMICHIGAN32025
RiggsvilleMICHIGAN32017
SkeelsMICHIGAN32011
HovlandMINNESOTA32003
Grand ViewWISCONSIN32025
CouderayWISCONSIN32025
ExelandWISCONSIN32025
Skegemog PtMICHIGAN22013
Traverse CtyMICHIGAN21992
Sand LakeMICHIGAN22025

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