BirdAnalyst
Species · BCR 28 · BBS 2026 Release · 1966–2025

Common Raven In Appalachian Mountains

All regionsAppalachian MountainsGeneralists

Common Raven in Appalachian Mountains has surged: up 24× on the route-weighted index since 1968.

24×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 →
260Routes 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 →
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 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 Appalachian Mountains: up 24× on the route-weighted index since 1968.

Common Raven In Appalachian Mountains Population Forecast

If the recent trend holds, Common Raven in Appalachian Mountains is projected to fall about 17% by 2030 — from 2.0 in 2025 to a central estimate of 1.6 (95% range 1.3–2.0). A 5-year backtest shows a typical error of ±21%, with 20% of held-out values landing inside the 95% band.

-17%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 →
1.6Projected 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 →
1.3–2.095% 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 →
±21%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 Appalachian Mountains is projected to fall about 17% by 2030 — from 2.0 in 2025 to a central estimate of 1.6 (95% range 1.3–2.0). A 5-year backtest shows a typical error of ±21%, with 20% 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 →
20261.51.21.9
20271.61.21.9
20281.61.31.9
20291.61.31.9
20301.61.32.0

Routes In Appalachian Mountains

Routes recording Common Raven in Appalachian Mountains.
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 →
ClearfieldPENNSYLVANIA382025
Big MeadowsVIRGINIA212025
Shenandoa NpVIRGINIA182025
VindexMARYLAND152024
ArnotPENNSYLVANIA132025
Broad Mtn.PENNSYLVANIA122025
Green RidgeMARYLAND112025
McdonoughNEW-YORK112017
DenmarWEST-VIRGINIA112025
RioWEST-VIRGINIA111994
FinzelMARYLAND102025
Iron Mtn.VIRGINIA102010
WymerWEST-VIRGINIA102015
Front RoyalVIRGINIA92025
SmootWEST-VIRGINIA92025
Lost RiverWEST-VIRGINIA92025
StoneybreakPENNSYLVANIA82024
Glade RunWEST-VIRGINIA82002
JenningsMARYLAND72025
High PointNEW-JERSEY72024
MedusaNEW-YORK72024
Little MarshPENNSYLVANIA72024
Bow BridgePENNSYLVANIA72025
WaterstreetPENNSYLVANIA72024
Wild CreekPENNSYLVANIA72025

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