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Species · Maryland · BBS 2026 Release · 1966–2025

White-eyed Vireo Population Trend in Maryland

All statesForest birds

White-eyed Vireo in Maryland has edged up: up 20% on the route-weighted index since 1968.

+20%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 →
73Routes 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 →
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 White-eyed Vireo Trends in MarylandNotable 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 Maryland. See the full index history below.

White-eyed Vireo Population Forecast in Maryland

If the recent trend holds, White-eyed Vireo in Maryland is projected to stay roughly flat through 2030, near 3.1 (95% range 1.5–4.8). A 5-year backtest shows a typical error of ±16%, with 100% of held-out values landing inside the 95% band.

+7%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 →
3.1Projected 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 →
1.5–4.895% 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 →
±16%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 Maryland is projected to stay roughly flat through 2030, near 3.1 (95% range 1.5–4.8). A 5-year backtest shows a typical error of ±16%, with 100% 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 →
20263.21.64.8
20273.21.64.8
20283.21.64.8
20293.21.54.8
20303.11.54.8

White-eyed Vireo Survey Routes in Maryland

Routes recording White-eyed Vireo in Maryland.
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 →
Cokesbury2820251966
Berlin1620251980
Newark1420251966
Walnut1220242001
Furnace Town1020252015
Honga820251966
Snow Hill819761966
Pomfret620241966
Sinepuxent619781966
Olney520251966
Pomonkey520251966
Earlton520242014
Pt Republic419891966
Matthews420251966
Mardela420191966
Grove Neck419961992
Jessup420242013
St. George'S Island420172016
Fair Hill419961992
Indiantown420141977
Madonna420222009
Nottingham420252005
Upper Xrds320061969
Largo319811967
Theodore320121968

White-eyed Vireo Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemassachusettsmichiganmississippimissourinebraskanew-jerseynew-yorknorth-carolinaohiooklahomapennsylvaniarhode-islandsouth-carolinatennesseetexasvirginiawest-virginiawisconsin

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