BirdAnalyst
Species · BCR 14 · BBS 2025 Release · 1966–2024

Common Raven In Atlantic Northern Forest

All regionsAtlantic Northern ForestGeneralists

Common Raven in Atlantic Northern Forest has surged: up 401% on the route-weighted index since 1968.

+401%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 →
150Routes 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 →
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 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 Atlantic Northern Forest: up 401% on the route-weighted index since 1968.

Forecast

If the recent trend holds, Common Raven in Atlantic Northern Forest is projected to rise about 20% by 2029 — from 3.4 in 2024 to a central estimate of 4.0 (95% range 2.7–5.3). A 5-year backtest shows a typical error of ±25.4%, with 80% of held-out values landing inside the 95% band.

+20%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 →
4.0Projected 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 →
2.7–5.395% 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 →
±25.4%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 Atlantic Northern Forest is projected to rise about 20% by 2029 — from 3.4 in 2024 to a central estimate of 4.0 (95% range 2.7–5.3). A 5-year backtest shows a typical error of ±25.4%, with 80% 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 →
20253.92.65.2
20263.92.65.2
20274.02.65.3
20284.02.75.3
20294.02.75.3

Routes In Atlantic Northern Forest

Routes recording Common Raven in Atlantic Northern Forest.
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 →
Ft FairfieldMAINE302005
AuroraMAINE162021
BrooksMAINE142019
InletNEW-YORK142017
NorthfieldMAINE131981
LudlowMAINE131998
WashburnMAINE132005
St JohnsburyVERMONT132024
ChesterfieldMASSACHUSETTS122024
CooperMAINE112021
WilmotNEW-HAMPSHIRE102024
MarlowNEW-HAMPSHIRE102024
DebloisMAINE92007
FranconiaNEW-HAMPSHIRE92024
W RutlandVERMONT92024
HartfordMAINE82024
UnderwoodNEW-YORK81996
BenedictaMAINE72019
WaiteMAINE71977
TelosMAINE72006
Heron LakeMAINE72002
LempsterNEW-HAMPSHIRE72024
Dixvil NotchNEW-HAMPSHIRE72016
Dixville Notch 2NEW-HAMPSHIRE72024
St Regis FlsNEW-YORK72017

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