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Species · BCR 24 · BBS 2026 Release · 1966–2025

Chipping Sparrow In Central Hardwoods

All regionsCentral HardwoodsForest birds

Chipping Sparrow in Central Hardwoods has held roughly steady: up 2% on the route-weighted index since 1968.

+2%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 →
166Routes 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 Chipping Sparrow in Central Hardwoods. See the full index history below.

Chipping Sparrow In Central Hardwoods Population Forecast

If the recent trend holds, Chipping Sparrow in Central Hardwoods is projected to rise about 15% by 2030 — from 12 in 2025 to a central estimate of 14 (95% range 10–17). A 5-year backtest shows a typical error of ±23.5%, with 100% of held-out values landing inside the 95% band.

+15%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 →
14Projected 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 →
10–1795% 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 →
±23.5%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, Chipping Sparrow in Central Hardwoods is projected to rise about 15% by 2030 — from 12 in 2025 to a central estimate of 14 (95% range 10–17). A 5-year backtest shows a typical error of ±23.5%, 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 →
2026139.716
2027139.817
2028139.917
20291310.017
2030141017

Routes In Central Hardwoods

Routes recording Chipping Sparrow in Central Hardwoods.
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 →
YorkILLINOIS592025
Bays ForkKENTUCKY472019
WashingtonINDIANA412025
CascadeMISSOURI402025
GatewoodKENTUCKY322019
BremenILLINOIS312025
AkersMISSOURI312025
Osage BeachMISSOURI292025
New PhilaINDIANA282025
Levee 2KENTUCKY272019
HegiraKENTUCKY262024
BrownvilleILLINOIS252025
Indian Mound 2TENNESSEE252023
RoyaltonILLINOIS242025
DixieKENTUCKY242019
Buena VistaKENTUCKY232017
AzaliaINDIANA222025
CollinwoodTENNESSEE222025
PeytonsvilleTENNESSEE222025
Union HillTENNESSEE222024
MerrimacKENTUCKY212024
Cave In RockILLINOIS202024
GeorgiaINDIANA202025
Brnt PrairieILLINOIS192025
CumbackINDIANA192025

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