BirdAnalyst
Species · BCR 29 · BBS 2025 Release · 1966–2024

Great Horned Owl In Piedmont

All regionsPiedmontGeneralists

Great Horned Owl in Piedmont has edged down: down 25% on the route-weighted index since 1968.

-25%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 →
104Routes 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 →

No notable trend signals for Great Horned Owl in Piedmont. See the full index history below.

Forecast

If the recent trend holds, Great Horned Owl in Piedmont is projected to stay roughly flat through 2029, near 0.07 (95% range 0.00–0.18). A 5-year backtest shows a typical error of ±159%, with 100% of held-out values landing inside the 95% band.

n/aChange 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 →
0.07Projected 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 →
0.00–0.1895% 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 →
±159%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, Great Horned Owl in Piedmont is projected to stay roughly flat through 2029, near 0.07 (95% range 0.00–0.18). A 5-year backtest shows a typical error of ±159%, with 100% 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 →
20250.070.000.18
20260.070.000.18
20270.070.000.18
20280.070.000.18
20290.070.000.18

Routes In Piedmont

Routes recording Great Horned Owl 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 →
Upper XrdsMARYLAND71994
SaxapahawNORTH-CAROLINA52008
ChesneeSOUTH-CAROLINA42013
OsmondNORTH-CAROLINA32012
JoannaSOUTH-CAROLINA32021
TaylorstownVIRGINIA31979
HallVIRGINIA31985
BowdonGEORGIA22004
Sunny SideGEORGIA22007
WarfieldsbrgMARYLAND22006
PottersvilleNEW-JERSEY22014
GilletteNEW-JERSEY22018
CallNORTH-CAROLINA22022
FlayNORTH-CAROLINA22022
BullockNORTH-CAROLINA22024
GatchelvillePENNSYLVANIA21985
Mt Gretna 2PENNSYLVANIA22018
JacobusPENNSYLVANIA21992
CampobelloSOUTH-CAROLINA22019
GreenwoodSOUTH-CAROLINA22017
AmherstVIRGINIA21986
MoranVIRGINIA22019
MillervilleALABAMA12009
LanettALABAMA12009
Liberty CityALABAMA11987

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