BirdAnalyst
Species · BCR 29 · BBS 2026 Release · 1966–2025

Common Raven In Piedmont

All regionsPiedmontGeneralists

Common Raven in Piedmont has surged: up 572% on the route-weighted index since 1981.

+572%Since 1981TrendPercent 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 →
38YearsYears 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 →

No notable trend signals for Common Raven in Piedmont. See the full index history below.

Common Raven In Piedmont Population Forecast

If the recent trend holds, Common Raven in Piedmont is projected to fall about 22% by 2030 — from 0.27 in 2025 to a central estimate of 0.21 (95% range 0.07–0.35). A 5-year backtest shows a typical error of ±60%, with 20% of held-out values landing inside the 95% band.

-22%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 →
0.21Projected 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 →
0.07–0.3595% 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 →
±60%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 Piedmont is projected to fall about 22% by 2030 — from 0.27 in 2025 to a central estimate of 0.21 (95% range 0.07–0.35). A 5-year backtest shows a typical error of ±60%, with 20% of held-out values landing inside the 95% band.19782030
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 →
20260.190.050.33
20270.200.060.33
20280.200.060.34
20290.200.060.34
20300.210.070.35

Routes In Piedmont

Routes recording Common Raven in Piedmont.
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 →
TaylorstownVIRGINIA92010
MoranVIRGINIA62024
IjamsvilleMARYLAND42023
PottersvilleNEW-JERSEY42014
Pleasant ValMARYLAND32019
LeolaPENNSYLVANIA32023
AmherstVIRGINIA32025
ConcordVIRGINIA32021
WylliesburgVIRGINIA32014
Taylorstown 2VIRGINIA32025
EmmitsburgMARYLAND22025
OlneyMARYLAND22025
MadonnaMARYLAND22022
GilletteNEW-JERSEY22025
YoungsvilleNORTH-CAROLINA22022
CopelandNORTH-CAROLINA22024
OsmondNORTH-CAROLINA22025
BendersvillePENNSYLVANIA22017
Owings 2SOUTH-CAROLINA22025
ShipmanVIRGINIA22024
ElamsvilleVIRGINIA22016
AppomattoxVIRGINIA22024
Lake AnnaVIRGINIA22025
EkloMARYLAND11978
SandbrookNEW-JERSEY12024

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