BirdAnalyst
Species · BCR 24 · BBS 2025 Release · 1966–2024

Bachman's Sparrow In Central Hardwoods

All regionsCentral HardwoodsGeneralists

Bachman's Sparrow in Central Hardwoods has collapsed: down 78% on the route-weighted index since 1968.

-78%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 →
17Routes 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 →
17YearsYears 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 →

long arc declinecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Bachman's Sparrow has collapsed in Central Hardwoods: down 78% on the route-weighted index since 1968.

Routes In Central Hardwoods

Routes recording Bachman's 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 →
HillsboroALABAMA21986
Valhermoso SpgsALABAMA21981
RupertARKANSAS21967
SyracuseMISSOURI21981
FultonARKANSAS11975
CantonKENTUCKY11982
MillionKENTUCKY11966
MerrimacKENTUCKY11969
DemunbrunsKENTUCKY11966
HudsonKENTUCKY11969
EastviewKENTUCKY11967
PorterKENTUCKY11967
PleasurevillKENTUCKY11984
ClementineMISSOURI11975
HaydenMISSOURI11975
CollinwoodTENNESSEE12016
Lewis ForestTENNESSEE11967

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