BirdAnalyst
Species · BCR 25 · BBS 2025 Release · 1966–2024

Black-bellied Whistling-Duck In West Gulf Coastal Plain / Ouachitas

All regionsWest Gulf Coastal Plain / OuachitasWaterfowl

Black-bellied Whistling-Duck in West Gulf Coastal Plain / Ouachitas has surged: up 274% on the route-weighted index since 2010.

+274%Since 2010TrendPercent 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 →
20Routes 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 →
16YearsYears 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 West Gulf Coastal Plain / Ouachitas: up 274% on the route-weighted index since 2010.

Routes In West Gulf Coastal Plain / Ouachitas

Routes recording Black-bellied Whistling-Duck in West Gulf Coastal Plain / Ouachitas.
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 →
Chandler 2TEXAS62009
Derry 2LOUISIANA42024
Liberty HillTEXAS42021
Town BluffTEXAS32024
DibollTEXAS32024
Mt. SelmanTEXAS32015
AshdownARKANSAS22018
Coal HillARKANSAS22019
LockesburgARKANSAS22018
LongstreetLOUISIANA22024
CheniereLOUISIANA22024
GoodwaterOKLAHOMA22017
Union HillTEXAS22024
Neches BithTEXAS22016
StampsARKANSAS12023
EvelynLOUISIANA12021
EnterpriseLOUISIANA12023
LivingstonTEXAS12024
New WaverlyTEXAS12024
AthensTEXAS12014

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