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Species · BCR 26 · BBS 2025 Release · 1966–2024

Song Sparrow In Mississippi Alluvial Valley

All regionsMississippi Alluvial ValleyGeneralists

Song Sparrow in Mississippi Alluvial Valley has edged down: down 19% on the route-weighted index since 1969.

-19%Since 1969TrendPercent 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 →
10Routes 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 →
56YearsYears 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 Mississippi Alluvial Valley. See the full index history below.

Forecast

If the recent trend holds, Song Sparrow in Mississippi Alluvial Valley is projected to rise about 93% by 2029 — from 0.18 in 2024 to a central estimate of 0.35 (95% range 0.00–1.1). A 5-year backtest shows a typical error of ±403.9%, with 100% of held-out values landing inside the 95% band.

+93%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 →
0.35Projected 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 →
0.00–1.195% 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 →
±403.9%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 Mississippi Alluvial Valley is projected to rise about 93% by 2029 — from 0.18 in 2024 to a central estimate of 0.35 (95% range 0.00–1.1). A 5-year backtest shows a typical error of ±403.9%, with 100% of held-out values landing inside the 95% band.19672029
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 →
20250.370.001.1
20260.360.001.1
20270.360.001.1
20280.360.001.1
20290.350.001.1

Routes In Mississippi Alluvial Valley

Routes recording Song Sparrow in Mississippi Alluvial Valley.
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 →
DeventerMISSOURI42024
MaynardARKANSAS22009
Cp GirardeauMISSOURI22024
BlodgettMISSOURI22022
WilsonARKANSAS11995
BardwellKENTUCKY12003
Bardwell 2KENTUCKY12021
KennettMISSOURI12023
TiptonvilleTENNESSEE11990
PawpawTENNESSEE11996

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