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

Indigo Bunting In Piedmont

All regionsPiedmontForest birds

Indigo Bunting in Piedmont has edged down: down 17% on the route-weighted index since 1968.

-17%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 →
171Routes 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 Indigo Bunting in Piedmont. See the full index history below.

Indigo Bunting In Piedmont Population Forecast

If the recent trend holds, Indigo Bunting in Piedmont is projected to rise about 11% by 2030 — from 21 in 2025 to a central estimate of 23 (95% range 17–29). A 5-year backtest shows a typical error of ±24.3%, with 80% of held-out values landing inside the 95% band.

+11%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 →
23Projected 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 →
17–2995% 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 →
±24.3%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, Indigo Bunting in Piedmont is projected to rise about 11% by 2030 — from 21 in 2025 to a central estimate of 23 (95% range 17–29). A 5-year backtest shows a typical error of ±24.3%, with 80% 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 →
2026231729
2027231729
2028231729
2029231729
2030231729

Routes In Piedmont

Routes recording Indigo Bunting 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 →
MadonnaMARYLAND912022
Liberty CityALABAMA782011
FinchleyVIRGINIA602021
Ft Pickett SVIRGINIA591995
MoranVIRGINIA582025
Stoney PointGEORGIA562007
Salem XrdSOUTH-CAROLINA552019
Ft Pickett NVIRGINIA531995
WylliesburgVIRGINIA512019
FairplayGEORGIA481991
IjamsvilleMARYLAND482025
BrodnaxVIRGINIA472025
EarltonMARYLAND432024
ConcordVIRGINIA432024
BullockNORTH-CAROLINA382025
TrymeVIRGINIA382025
MaxeysGEORGIA372024
EdenNORTH-CAROLINA372025
GladysVIRGINIA362025
Lincolnton 2GEORGIA352025
EmmitsburgMARYLAND352025
Big IslandVIRGINIA352025
CandlerGEORGIA342025
OsmondNORTH-CAROLINA342025
OlneyMARYLAND332025

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