BirdAnalyst
Species · North Carolina · BBS 2025 Release · 1966–2024

Henslow's Sparrow Population Trend in North Carolina

All statesGrassland birds

Henslow's Sparrow in North Carolina has fallen sharply: down 68% on the route-weighted index since 1985.

-68%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 →
6Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
13YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Henslow's Sparrow Trends in North CarolinaNotable 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 →

Henslow's Sparrow has fallen sharply in North Carolina: down 68% on the route-weighted index since 1985.

Henslow's Sparrow Survey Routes in North Carolina

Routes recording Henslow's Sparrow in North Carolina.
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 →
Speed419951988
Jamesville319921983
Shallotte119911987
Supply119951995
Montague119941994
California119851985

Henslow's Sparrow Population Trend in Other States

delawareillinoisindianaiowakansaskentuckymarylandmichiganminnesotamissourinebraskanew-yorknorth-dakotaohiooklahomapennsylvaniasouth-dakotavermontvirginiawest-virginiawisconsin

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