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

Yellow-throated Vireo Population Trend in Maine

All statesForest birds

Yellow-throated Vireo in Maine has fallen sharply: down 71% on the route-weighted index since 1975.

-71%Since 1975TrendPercent 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 →
13Routes 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 →
27YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Yellow-throated Vireo Trends in MaineNotable 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 declinecomputed 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 fallen sharply in Maine: down 71% on the route-weighted index since 1975.

Yellow-throated Vireo Population Forecast in Maine

If the recent trend holds, Yellow-throated Vireo in Maine is projected to stay roughly flat through 2015, near 0.01 (95% range 0.00–0.08). A 5-year backtest shows a typical error of ±38.7%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2015TrendPercent 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 →
0.01Projected 2015 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.0895% 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 →
±38.7%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 Maine is projected to stay roughly flat through 2015, near 0.01 (95% range 0.00–0.08). A 5-year backtest shows a typical error of ±38.7%, with 100% of held-out values landing inside the 95% band.19692015
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 →
20110.020.000.08
20120.010.000.08
20130.010.000.08
20140.010.000.08
20150.010.000.08

Yellow-throated Vireo Survey Routes in Maine

Routes recording Yellow-throated Vireo in Maine.
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 →
Biddeford220011978
Harmony219991999
Seboomook Lk119811981
Winn119991999
South Arm119981995
Otisfield Gr120072003
Hartford120082008
Bowdoin Ctr120101991
Forest Sta119851969
Rome119971997
Brooks119931977
Hancock119971994
Castine119771976

Yellow-throated Vireo Population Trend in Other States

alabamaarkansasconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamarylandmassachusettsmichiganminnesotamississippimissourinebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsin

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