BirdAnalyst
Species · BCR 25 · BBS 2026 Release · 1966–2025

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 321% on the route-weighted index since 2010.

+321%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 →
23Routes 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 →

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 321% 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 →
HopeARKANSAS92025
Chandler 2TEXAS62009
Derry 2LOUISIANA42024
MatoyOKLAHOMA42025
Town BluffTEXAS32024
DibollTEXAS32024
Mt. SelmanTEXAS32015
AshdownARKANSAS22018
Coal HillARKANSAS22019
LockesburgARKANSAS22018
LongstreetLOUISIANA22024
CheniereLOUISIANA22025
GoodwaterOKLAHOMA22017
LivingstonTEXAS22025
New WaverlyTEXAS22025
Union HillTEXAS22024
Neches BithTEXAS22016
StampsARKANSAS12023
EvelynLOUISIANA12021
EnterpriseLOUISIANA12023
AthensTEXAS12014
Liberty HillTEXAS12025
WechesTEXAS12025

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