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

Field Sparrow In Southeastern Coastal Plain

All regionsSoutheastern Coastal PlainGeneralists

Field Sparrow in Southeastern Coastal Plain has declined: down 44% on the route-weighted index since 1968.

-44%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 →
250Routes 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 Field Sparrow in Southeastern Coastal Plain. See the full index history below.

Field Sparrow In Southeastern Coastal Plain Population Forecast

If the recent trend holds, Field Sparrow in Southeastern Coastal Plain is projected to fall about 29% by 2029 — from 3.6 in 2024 to a central estimate of 2.5 (95% range 1.3–3.8). A 5-year backtest shows a typical error of ±15.7%, with 100% of held-out values landing inside the 95% band.

-29%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 →
2.5Projected 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 →
1.3–3.895% 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 →
±15.7%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, Field Sparrow in Southeastern Coastal Plain is projected to fall about 29% by 2029 — from 3.6 in 2024 to a central estimate of 2.5 (95% range 1.3–3.8). A 5-year backtest shows a typical error of ±15.7%, 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 →
20252.61.43.9
20262.61.43.8
20272.61.33.8
20282.51.33.8
20292.51.33.8

Routes In Southeastern Coastal Plain

Routes recording Field 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 →
PhilemaGEORGIA392024
MansfieldTENNESSEE352024
HendersonGEORGIA302024
DolesGEORGIA272022
FinleysonGEORGIA212024
JacksonNORTH-CAROLINA212017
ElamvilleALABAMA202024
HumboldtTENNESSEE202024
DickeyGEORGIA192018
OwensboroGEORGIA182024
TibbsTENNESSEE182024
BrownsvilleTENNESSEE162024
WadleyGEORGIA152024
Big SandyTENNESSEE152024
HawkinsvilleGEORGIA132024
RentzGEORGIA132024
BethanyGEORGIA132024
BranchvilleVIRGINIA132024
LacrossGEORGIA122021
BostonGEORGIA122024
LovelacevileKENTUCKY122024
NewsomsVIRGINIA122024
FitzgeraldGEORGIA112024
Boykin Ml PdSOUTH-CAROLINA111968
SurryVIRGINIA112024

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