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

Common Raven Population Trend in New Jersey

All statesGeneralists

Common Raven in New Jersey has surged: up 721% on the route-weighted index since 1996.

+721%Since 1996TrendPercent 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 →
10Routes 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 →
23YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Common Raven 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 →

Common Raven has surged in New Jersey: up 721% on the route-weighted index since 1996.

Common Raven Population Forecast in New Jersey

If the recent trend holds, Common Raven in New Jersey is projected to rise about 272% by 2030 — from 0.11 in 2025 to a central estimate of 0.41 (95% range 0.06–0.77). A 5-year backtest shows a typical error of ±79.8%, with 40% of held-out values landing inside the 95% band.

+272%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 →
0.41Projected 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 →
0.06–0.7795% 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 →
±79.8%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, Common Raven in New Jersey is projected to rise about 272% by 2030 — from 0.11 in 2025 to a central estimate of 0.41 (95% range 0.06–0.77). A 5-year backtest shows a typical error of ±79.8%, with 40% of held-out values landing inside the 95% band.19942030
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 →
20260.370.010.73
20270.380.020.74
20280.390.030.75
20290.400.040.76
20300.410.060.77

Common Raven Survey Routes in New Jersey

Routes recording Common Raven 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 Point720241994
Dover620232016
Pottersville420142014
Midvale220142014
Kemah Lake220242014
Gillette220252019
Friendship220242024
Spraguetown 3120242024
Sandbrook120242022
Ramseysburg120232001

Common Raven Population Trend in Other States

alaskaarizonacaliforniacoloradoconnecticutgeorgiaidahokentuckymainemarylandmassachusettsmichiganminnesotamontananebraskanevadanew-hampshirenew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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