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

Wood Duck In Piedmont

All regionsPiedmontWaterfowl

Wood Duck in Piedmont has surged: up 243% on the route-weighted index since 1968.

+243%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 →
116Routes 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 →

Wood Duck has surged in Piedmont: up 243% on the route-weighted index since 1968.

Wood Duck In Piedmont Population Forecast

If the recent trend holds, Wood Duck in Piedmont is projected to rise about 90% by 2029 — from 0.16 in 2024 to a central estimate of 0.30 (95% range 0.03–0.56). A 5-year backtest shows a typical error of ±41.1%, with 100% of held-out values landing inside the 95% band.

+90%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 →
0.30Projected 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 →
0.03–0.5695% 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 →
±41.1%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, Wood Duck in Piedmont is projected to rise about 90% by 2029 — from 0.16 in 2024 to a central estimate of 0.30 (95% range 0.03–0.56). A 5-year backtest shows a typical error of ±41.1%, 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 →
20250.290.030.55
20260.290.030.55
20270.290.030.56
20280.290.030.56
20290.300.030.56

Routes In Piedmont

Routes recording Wood Duck 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 →
CrotonNEW-JERSEY151998
LabottPENNSYLVANIA111970
FlayNORTH-CAROLINA72021
HallVIRGINIA72002
TaylorstownVIRGINIA62008
Big IslandVIRGINIA61983
WylliesburgVIRGINIA62017
Curry HillGEORGIA52009
DavidVIRGINIA52001
ConcordVIRGINIA52010
CrestGEORGIA41995
RutledgeGEORGIA42019
CallNORTH-CAROLINA42018
SiloamNORTH-CAROLINA42016
LanettALABAMA32008
HollonvilleGEORGIA31978
GrovetownGEORGIA31998
ArcolaNORTH-CAROLINA32023
GoldstonNORTH-CAROLINA32013
AspersPENNSYLVANIA31981
Doe RunPENNSYLVANIA32021
ChathamPENNSYLVANIA32024
Barton CreekSOUTH-CAROLINA32022
Owings 2SOUTH-CAROLINA32023
Liberty CityALABAMA22010

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