BirdAnalyst
Species · BCR 30 · BBS 2025 Release · 1966–2024

Common Raven In New England / Mid-Atlantic Coast

All regionsNew England / Mid-Atlantic CoastGeneralists

Common Raven in New England / Mid-Atlantic Coast has surged: up 23× on the route-weighted index since 1991.

23×Since 1991TrendPercent 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 →
45Routes In RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
33YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable SignalsNotable 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 England / Mid-Atlantic Coast: up 23× on the route-weighted index since 1991.

Forecast

If the recent trend holds, Common Raven in New England / Mid-Atlantic Coast is projected to fall about 22% by 2029 — from 0.50 in 2024 to a central estimate of 0.39 (95% range 0.23–0.56). A 5-year backtest shows a typical error of ±45.4%, with 20% of held-out values landing inside the 95% band.

-22%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 →
0.39Projected 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 →
0.23–0.5695% 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 →
±45.4%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, Common Raven in New England / Mid-Atlantic Coast is projected to fall about 22% by 2029 — from 0.50 in 2024 to a central estimate of 0.39 (95% range 0.23–0.56). A 5-year backtest shows a typical error of ±45.4%, with 20% of held-out values landing inside the 95% band.19872029
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 →
20250.350.180.51
20260.360.190.52
20270.370.200.53
20280.380.220.55
20290.390.230.56

Routes In New England / Mid-Atlantic Coast

Routes recording Common Raven in New England / Mid-Atlantic Coast.
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 →
UncasvilleCONNECTICUT92024
JessupMARYLAND52024
StraffordNEW-HAMPSHIRE52024
ShermanCONNECTICUT42019
East KingstonNEW-HAMPSHIRE42024
Casimir Pulaski SfRHODE-ISLAND42018
Woodstock 2CONNECTICUT32023
MansfieldMASSACHUSETTS32018
HauppaugeNEW-YORK31997
ShannockRHODE-ISLAND32023
BuckinghamCONNECTICUT22022
WestbrookCONNECTICUT22019
No WoodburyCONNECTICUT22024
Long HillCONNECTICUT22018
PrattvilleMASSACHUSETTS22015
LittletonMASSACHUSETTS22024
BelchertownMASSACHUSETTS22024
S BarreMASSACHUSETTS22021
N. AndoverMASSACHUSETTS22018
DoverNEW-HAMPSHIRE22024
EpsomNEW-HAMPSHIRE22023
FriendshipNEW-JERSEY22024
Wallum LakeRHODE-ISLAND22018
WillimanticCONNECTICUT12003
GreenwichCONNECTICUT12018

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