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Species · Connecticut · BBS 2025 Release · 1966–2024

White-eyed Vireo Population Trend in Connecticut

All statesForest birds

White-eyed Vireo in Connecticut has held roughly steady: down 3% on the route-weighted index since 1973.

-3%Since 1973TrendPercent 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 →
14Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
47YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable White-eyed Vireo Trends in ConnecticutNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for White-eyed Vireo in Connecticut. See the full index history below.

White-eyed Vireo Population Forecast in Connecticut

If the recent trend holds, White-eyed Vireo in Connecticut is projected to rise about 94% by 2029 — from 0.11 in 2024 to a central estimate of 0.21 (95% range 0.00–0.67). A 5-year backtest shows a typical error of ±154.6%, with 100% of held-out values landing inside the 95% band.

+94%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 →
0.21Projected 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 →
0.00–0.6795% 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 →
±154.6%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, White-eyed Vireo in Connecticut is projected to rise about 94% by 2029 — from 0.11 in 2024 to a central estimate of 0.21 (95% range 0.00–0.67). A 5-year backtest shows a typical error of ±154.6%, with 100% of held-out values landing inside the 95% band.19702029
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 →
20250.230.000.69
20260.220.000.68
20270.220.000.68
20280.220.000.68
20290.210.000.67

White-eyed Vireo Survey Routes in Connecticut

Routes recording White-eyed Vireo in Connecticut.
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 →
Mystic220121973
Mid Haddam219951980
Buckingham120081970
Uncasville120241977
Woodstock119831979
Westbrook119921984
Willimantic119851975
No Woodbury120051974
Sherman119831981
Greenwich120001992
Danbury119831971
Warren119831979
Long Hill119801978
Southington119771977

White-eyed Vireo Population Trend in Other States

alabamaarkansasdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganmississippimissourinebraskanew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniarhode-islandsouth-carolinatennesseetexasvirginiawest-virginiawisconsin

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