BirdAnalyst
Species · Maryland · BBS 2025 Release · 1966–2024

White-eyed Vireo Population Trend in Maryland

All statesForest birds

White-eyed Vireo in Maryland has increased: up 28% on the route-weighted index since 1968.

+28%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 →
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 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 fall about 16% by 2029 — from 3.8 in 2024 to a central estimate of 3.2 (95% range 1.6–4.8). A 5-year backtest shows a typical error of ±17.4%, with 100% of held-out values landing inside the 95% band.

-16%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 →
3.2Projected 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 →
1.6–4.895% 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 →
±17.4%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, White-eyed Vireo in Maryland is projected to fall about 16% by 2029 — from 3.8 in 2024 to a central estimate of 3.2 (95% range 1.6–4.8). A 5-year backtest shows a typical error of ±17.4%, with 100% 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 →
20253.21.64.8
20263.21.64.8
20273.21.64.8
20283.21.64.8
20293.21.64.8

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 →
Cokesbury3720241966
Furnace Town1420242015
Walnut1220242001
Newark1120241966
Berlin920241980
Snow Hill819761966
Nottingham820242005
Pomfret620241966
Matthews620241966
Madison620241966
Sinepuxent619781966
Hughesville520241966
Vienna520241966
Earlton520242014
Pt Republic419891966
Pomonkey420241966
Millington420241966
Honga420241966
Mardela420191966
Grove Neck419961992
Jessup420242013
St. George'S Island420172016
Fair Hill419961992
Indiantown420141977
Madonna420222009

White-eyed Vireo Population Trend in Other States

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

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