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

Song Sparrow In Southeastern Coastal Plain

All regionsSoutheastern Coastal PlainForest birds

Song Sparrow in Southeastern Coastal Plain has edged down: down 25% on the route-weighted index since 1968.

-25%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 →
48Routes 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 Song Sparrow in Southeastern Coastal Plain. See the full index history below.

Song Sparrow In Southeastern Coastal Plain Population Forecast

If the recent trend holds, Song Sparrow in Southeastern Coastal Plain is projected to fall about 69% by 2030 — from 0.10 in 2025 to a central estimate of 0.03 (95% range 0.00–0.11). A 5-year backtest shows a typical error of ±42.2%, with 100% of held-out values landing inside the 95% band.

-69%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 →
0.03Projected 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 →
0.00–0.1195% 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 →
±42.2%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, Song Sparrow in Southeastern Coastal Plain is projected to fall about 69% by 2030 — from 0.10 in 2025 to a central estimate of 0.03 (95% range 0.00–0.11). A 5-year backtest shows a typical error of ±42.2%, 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 →
20260.040.000.11
20270.030.000.11
20280.030.000.11
20290.030.000.11
20300.030.000.11

Routes In Southeastern Coastal Plain

Routes recording Song Sparrow 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 →
BackbayVIRGINIA121974
Lloyd XroadsNORTH-CAROLINA91992
HamletNORTH-CAROLINA81999
St FlorianALABAMA72025
Minter TweedGEORGIA62006
WorkmoreGEORGIA51981
SweetlipsTENNESSEE51997
PungoVIRGINIA52025
JamesvilleNORTH-CAROLINA42006
RoseboroNORTH-CAROLINA42003
TazewellGEORGIA31991
RoseNORTH-CAROLINA32003
RheasvilleNORTH-CAROLINA32017
HardeevilleSOUTH-CAROLINA31972
CornlandVIRGINIA32006
DeepstepGEORGIA22006
ShilohKENTUCKY22025
CorinthMISSISSIPPI22016
TupeloMISSISSIPPI22009
Cypress LakesNORTH-CAROLINA22008
BishopvilleSOUTH-CAROLINA21992
BrownsvilleTENNESSEE22006
AutaugavilleALABAMA11998
CuthbertGEORGIA12012
LyonsGEORGIA11994

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