BirdAnalyst
Species · BCR 27 · BBS 2026 Release · 1966–2025

Black-bellied Whistling-Duck In Southeastern Coastal Plain

All regionsSoutheastern Coastal PlainWaterfowl

Black-bellied Whistling-Duck in Southeastern Coastal Plain has surged: up 630% on the route-weighted index since 2013.

+630%Since 2013TrendPercent 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 →
43Routes 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 →
14YearsYears 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 increasecomputed 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 →

Black-bellied Whistling-Duck has surged in Southeastern Coastal Plain: up 630% on the route-weighted index since 2013.

Routes In Southeastern Coastal Plain

Routes recording Black-bellied Whistling-Duck 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 →
BethanyGEORGIA362025
Dowling ParkFLORIDA82025
NecaiseMISSISSIPPI72022
NewtonGEORGIA52025
Pearl RiverLOUISIANA52025
Latimer 2MISSISSIPPI52023
Chacaloochee BayALABAMA42019
PinettaFLORIDA42025
Cross CityFLORIDA42019
Hildreth 2FLORIDA42025
DarienGEORGIA42019
StocktonGEORGIA42021
OusleyGEORGIA42025
PhilemaGEORGIA42024
Holly HillSOUTH-CAROLINA42025
Bay MinetteALABAMA32025
ShilohGEORGIA32024
PlettenbergLOUISIANA32021
Adams RunSOUTH-CAROLINA32025
GrangeburgALABAMA22024
WhitehallALABAMA22023
FairviewALABAMA22024
Broad BranchFLORIDA22025
MiccosukeeFLORIDA22019
BelmontFLORIDA22025

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