BirdAnalyst
Species · New Jersey · BBS 2025 Release · 1966–2024

Red-eyed Vireo Population Trend in New Jersey

All statesForest birds

Red-eyed Vireo in New Jersey has risen sharply: up 71% on the route-weighted index since 1968.

+71%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 →
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 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 71% 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 stay roughly flat through 2029, near 8.6 (95% range 6.7–11). A 5-year backtest shows a typical error of ±9%, with 100% of held-out values landing inside the 95% band.

+6%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 →
8.6Projected 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 →
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 →
±9%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 stay roughly flat through 2029, near 8.6 (95% range 6.7–11). A 5-year backtest shows a typical error of ±9%, 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 →
20258.36.310
20268.46.410
20278.56.510
20288.66.610
20298.66.711

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 →
High Point5320241977
Kemah Lake3320241968
Hope2019941970
Midvale1520221967
Estell Manor1520222021
Ramseysburg1220241995
Friendship920241977
Cape May Ch920131992
Winslow920241989
Dover820231977
Pomona820241978
Bennett Mill720001966
Pedricktown 2720242013
Pedricktown720121991
Greenwich620241966
Villas619811979
Bennett Mill 2620242016
Woodbury Hgt520241967
Six Points520241978
Ancora419771966
Holmansville420091969
New Bedford420171969
Croton420071970
Gillette420241988
Keyport420211986

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 2026-05-22.