BirdAnalyst
Species · New Jersey · BBS 2026 Release · 1966–2025

Red-eyed Vireo Population Trend in New Jersey

All statesForest birds

Red-eyed Vireo in New Jersey has risen sharply: up 73% on the route-weighted index since 1968.

+73%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 →
42Routes 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 Red-eyed Vireo Trends in New JerseyNotable 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 →

Red-eyed Vireo has risen sharply in New Jersey: up 73% on the route-weighted index since 1968.

Red-eyed Vireo Population Forecast in New Jersey

If the recent trend holds, Red-eyed Vireo in New Jersey is projected to rise about 16% by 2030 — from 7.5 in 2025 to a central estimate of 8.7 (95% range 6.7–11). A 5-year backtest shows a typical error of ±11.4%, with 100% of held-out values landing inside the 95% band.

+16%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 →
8.7Projected 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 →
6.7–1195% 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 →
±11.4%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, Red-eyed Vireo in New Jersey is projected to rise about 16% by 2030 — from 7.5 in 2025 to a central estimate of 8.7 (95% range 6.7–11). A 5-year backtest shows a typical error of ±11.4%, 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 →
20268.36.410
20278.46.510
20288.56.610
20298.66.611
20308.76.711

Red-eyed Vireo Survey Routes in New Jersey

Routes recording Red-eyed Vireo in New Jersey.
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 →
Kemah Lake3320241968
High Point2620251977
Hope2019941970
Estell Manor1820252021
Ramseysburg1620251995
Midvale1520221967
Pomona920251978
Cape May Ch920131992
Woodbury Hgt820251967
Sandbrook820251969
Dover820231977
Greenwich720251966
Six Points720251978
Bennett Mill720001966
Pedricktown720121991
Bloomsbury620251969
Villas619811979
Pedricktown 2620252013
Winslow620251989
Bennett Mill 2520252016
Ancora419771966
Holmansville420091969
New Bedford420171969
Croton420071970
Gillette420251988

Red-eyed Vireo Population Trend in Other States

alabamaalaskaarkansascoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawashingtonwest-virginiawisconsinwyoming

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