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

Black-billed Cuckoo In Southeastern Coastal Plain

All regionsSoutheastern Coastal PlainGeneralists

Black-billed Cuckoo in Southeastern Coastal Plain has collapsed: down 78% on the route-weighted index since 1974.

-78%Since 1974TrendPercent 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 →
8Routes 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 →
15YearsYears 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 Black-billed Cuckoo in Southeastern Coastal Plain. See the full index history below.

Routes In Southeastern Coastal Plain

Routes recording Black-billed Cuckoo 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 →
Milltail CrNORTH-CAROLINA61997
BloctonALABAMA11974
Sheep RidgeNORTH-CAROLINA12014
SweetlipsTENNESSEE11997
SurryVIRGINIA11993
NewsomsVIRGINIA11988
BranchvilleVIRGINIA12024
NewvilleVIRGINIA12007

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