BirdAnalyst
Species · BCR 27 · BBS 2025 Release · 1966–2024

Summer Tanager In Southeastern Coastal Plain

All regionsSoutheastern Coastal PlainGeneralists

Summer Tanager in Southeastern Coastal Plain has edged up: up 21% on the route-weighted index since 1968.

+21%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 →
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 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 2029, near 7.5 (95% range 6.4–8.5). A 5-year backtest shows a typical error of ±4.4%, with 100% of held-out values landing inside the 95% band.

+3%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 →
7.5Projected 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 →
6.4–8.595% 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 →
±4.4%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 2029, near 7.5 (95% range 6.4–8.5). A 5-year backtest shows a typical error of ±4.4%, 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 →
20257.36.38.4
20267.46.38.4
20277.46.48.4
20287.46.48.5
20297.56.48.5

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
HoltALABAMA262024
BeverlyMISSISSIPPI232011
SpeedNORTH-CAROLINA232024
CaliforniaNORTH-CAROLINA232013
Scooba 2MISSISSIPPI221987
Trace ChickasawMISSISSIPPI222024
CorinthMISSISSIPPI212024
Water ValleyMISSISSIPPI202018
SandhillsSOUTH-CAROLINA202024
Big SandyTENNESSEE202024
WallsboroALABAMA192021
Holly SpringsMISSISSIPPI192024
Trace AttalaMISSISSIPPI192019
Trace ChoctawMISSISSIPPI182019
BillingsleyALABAMA172022
Maple HillNORTH-CAROLINA172023
MansfieldTENNESSEE172024
Rock ChapelALABAMA162024
TazewellGEORGIA162024
ScoobaMISSISSIPPI161982

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