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

Common Yellowthroat In Piedmont

All regionsPiedmontForest birds

Common Yellowthroat in Piedmont has declined: down 37% on the route-weighted index since 1968.

-37%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 →
170Routes 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 →

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

Common Yellowthroat In Piedmont Population Forecast

If the recent trend holds, Common Yellowthroat in Piedmont is projected to fall about 12% by 2030 — from 5.3 in 2025 to a central estimate of 4.7 (95% range 3.0–6.3). A 5-year backtest shows a typical error of ±8.9%, with 100% of held-out values landing inside the 95% band.

-12%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 →
4.7Projected 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 →
3.0–6.395% 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 →
±8.9%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 Yellowthroat in Piedmont is projected to fall about 12% by 2030 — from 5.3 in 2025 to a central estimate of 4.7 (95% range 3.0–6.3). A 5-year backtest shows a typical error of ±8.9%, with 100% 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 →
20264.93.26.5
20274.83.16.5
20284.83.16.4
20294.73.06.4
20304.73.06.3

Routes In Piedmont

Routes recording Common Yellowthroat 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-JERSEY232007
CherryvilleNORTH-CAROLINA231968
Salem XrdSOUTH-CAROLINA222019
West GrovePENNSYLVANIA181996
TrymeVIRGINIA182025
Ft Pickett NVIRGINIA181995
EarltonMARYLAND172024
MadonnaMARYLAND162022
PendletonSOUTH-CAROLINA161976
OlneyMARYLAND152025
BiscoeNORTH-CAROLINA152025
EmmitsburgMARYLAND142025
Ft Pickett SVIRGINIA141995
Doe RunPENNSYLVANIA132025
FinchleyVIRGINIA132021
Nixburg 2ALABAMA122025
Bald FriarMARYLAND121996
Mount AiryNORTH-CAROLINA122025
ChathamPENNSYLVANIA112025
GreenwoodSOUTH-CAROLINA112025
MoranVIRGINIA112025
LanettALABAMA102024
CandlerGEORGIA102025
WarfieldsbrgMARYLAND102025
CopelandNORTH-CAROLINA102025

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