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

Henslow's Sparrow In Southeastern Coastal Plain

All regionsSoutheastern Coastal PlainGrassland birds

Henslow's Sparrow in Southeastern Coastal Plain has collapsed: down 87% on the route-weighted index since 1985.

-87%Since 1985TrendPercent 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 →
7Routes 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 →

No notable trend signals for Henslow's Sparrow in Southeastern Coastal Plain. See the full index history below.

Routes In Southeastern Coastal Plain

Routes recording Henslow's 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 →
SpeedNORTH-CAROLINA41995
JamesvilleNORTH-CAROLINA31992
ShilohKENTUCKY12006
ShallotteNORTH-CAROLINA11991
CaliforniaNORTH-CAROLINA11985
SupplyNORTH-CAROLINA11995
MontagueNORTH-CAROLINA11994

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