BirdAnalyst
Species · BCR 27 · BBS 2026 Release · 1966–2025

Summer Tanager In Southeastern Coastal Plain

All regionsSoutheastern Coastal PlainForest birds

Summer Tanager in Southeastern Coastal Plain has edged up: up 23% on the route-weighted index since 1968.

+23%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 →
339Routes 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 Summer Tanager in Southeastern Coastal Plain. See the full index history below.

Summer Tanager In Southeastern Coastal Plain Population Forecast

If the recent trend holds, Summer Tanager in Southeastern Coastal Plain is projected to stay roughly flat through 2030, near 7.5 (95% range 6.5–8.5). A 5-year backtest shows a typical error of ±3.3%, with 100% of held-out values landing inside the 95% band.

-1%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 →
7.5Projected 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 →
6.5–8.595% 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 →
±3.3%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, Summer Tanager in Southeastern Coastal Plain is projected to stay roughly flat through 2030, near 7.5 (95% range 6.5–8.5). A 5-year backtest shows a typical error of ±3.3%, 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 →
20267.46.38.4
20277.46.48.4
20287.46.48.5
20297.56.48.5
20307.56.58.5

Routes In Southeastern Coastal Plain

Routes recording Summer Tanager in Southeastern Coastal Plain.
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 →
LovedaleFLORIDA372011
DeepstepGEORGIA332023
Trace SouthMISSISSIPPI332019
EpesALABAMA302024
Vicksburg NpMISSISSIPPI282021
NorwoodLOUISIANA272025
Big SandyTENNESSEE252025
BeverlyMISSISSIPPI232011
CaliforniaNORTH-CAROLINA232013
Scooba 2MISSISSIPPI221987
Water ValleyMISSISSIPPI202018
BlackwaterFLORIDA192025
Trace CentralMISSISSIPPI192025
Holly SpringsMISSISSIPPI192024
Trace AttalaMISSISSIPPI192019
Trace ChickasawMISSISSIPPI192025
CowardSOUTH-CAROLINA192025
NixvilleSOUTH-CAROLINA192025
SpragueALABAMA182025
Trace ChoctawMISSISSIPPI182019
SandhillsSOUTH-CAROLINA182025
Warrior StdALABAMA172025
HoltALABAMA172025
RentzGEORGIA172025
SpeedNORTH-CAROLINA172025

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