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

Pine Warbler In Piedmont

All regionsPiedmontForest birds

Pine Warbler in Piedmont has surged: up 310% on the route-weighted index since 1968.

+310%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 →
136Routes 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 →

Pine Warbler has surged in Piedmont: up 310% on the route-weighted index since 1968.

Pine Warbler In Piedmont Population Forecast

If the recent trend holds, Pine Warbler in Piedmont is projected to rise about 30% by 2029 — from 8.3 in 2024 to a central estimate of 11 (95% range 6.9–15). A 5-year backtest shows a typical error of ±16.5%, with 100% of held-out values landing inside the 95% band.

+30%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 →
11Projected 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 →
6.9–1595% 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 →
±16.5%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, Pine Warbler in Piedmont is projected to rise about 30% by 2029 — from 8.3 in 2024 to a central estimate of 11 (95% range 6.9–15). A 5-year backtest shows a typical error of ±16.5%, 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 →
2025106.514
2026106.614
2027116.714
2028116.815
2029116.915

Routes In Piedmont

Routes recording Pine Warbler 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 →
Piedmont NwrGEORGIA522003
Plum BranchSOUTH-CAROLINA492024
RidgewaySOUTH-CAROLINA422021
Liberty City 2ALABAMA382024
FairplayGEORGIA361991
Carrs StationGEORGIA362024
Curry HillGEORGIA352019
YoungsvilleNORTH-CAROLINA342024
WhitesburgGEORGIA312024
ArcolaNORTH-CAROLINA312024
Little MtnSOUTH-CAROLINA291988
SharonGEORGIA282022
LincolntonGEORGIA252017
Kite LakeGEORGIA252023
Uwharrie NfNORTH-CAROLINA252001
Cauthens XrdSOUTH-CAROLINA252021
GrovetownGEORGIA242021
JulietteGEORGIA242024
MaxeysGEORGIA232024
StockbridgeGEORGIA222023
GuptonNORTH-CAROLINA222024
Stoney PointGEORGIA212007
Yates CrossroadsGEORGIA202024
Barton CreekSOUTH-CAROLINA202022
BrodnaxVIRGINIA202024

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