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

Common Yellowthroat In Piedmont

All regionsPiedmontForest birds

Common Yellowthroat in Piedmont has declined: down 39% on the route-weighted index since 1968.

-39%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 →
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 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 13% by 2029 — from 5.3 in 2024 to a central estimate of 4.7 (95% range 3.0–6.4). A 5-year backtest shows a typical error of ±9%, with 100% of held-out values landing inside the 95% band.

-13%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 →
4.7Projected 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 →
3.0–6.495% 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 →
±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 13% by 2029 — from 5.3 in 2024 to a central estimate of 4.7 (95% range 3.0–6.4). A 5-year backtest shows a typical error of ±9%, 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 →
20254.93.26.6
20264.83.16.5
20274.83.16.5
20284.73.06.4
20294.73.06.4

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
OlneyMARYLAND202024
West GrovePENNSYLVANIA181996
Ft Pickett NVIRGINIA181995
EarltonMARYLAND172024
EmmitsburgMARYLAND162024
MadonnaMARYLAND162022
PendletonSOUTH-CAROLINA161976
Mount AiryNORTH-CAROLINA142024
Ft Pickett SVIRGINIA141995
CandlerGEORGIA132024
SandbrookNEW-JERSEY132024
TrymeVIRGINIA132024
BrodnaxVIRGINIA132024
FinchleyVIRGINIA132021
Bald FriarMARYLAND121996
Croton 2NEW-JERSEY112024
EdenNORTH-CAROLINA112024
Doe RunPENNSYLVANIA112024
MannboroVIRGINIA112024
Brandy StationVIRGINIA112024
LanettALABAMA102024
DurhamNORTH-CAROLINA102024

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