BirdAnalyst
Species · Louisiana · BBS 2025 Release · 1966–2024

Black-bellied Whistling-Duck Population Trend in Louisiana

All statesWaterfowl

Black-bellied Whistling-Duck in Louisiana has surged: up 45× on the route-weighted index since 2003.

45×Since 2003
41Routes In State
22Years

Notable Black-bellied Whistling-Duck Trends in Louisiana

long arc increasecomputed index

Black-bellied Whistling-Duck has surged in Louisiana: up 45× on the route-weighted index since 2003.

Black-bellied Whistling-Duck Population Forecast in Louisiana

If the recent trend holds, Black-bellied Whistling-Duck in Louisiana is projected to fall about 20% by 2029 — from 5.8 in 2024 to a central estimate of 4.7 (95% range 3.2–6.1). A 5-year backtest shows a typical error of ±42.5%, with 20% of held-out values landing inside the 95% band.

-20%Change by 2029
4.7Projected 2029 index
3.2–6.195% range
±42.5%Backtest error
20012029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20253.92.45.4
20264.12.65.6
20274.32.85.7
20284.53.05.9
20294.73.26.1

Black-bellied Whistling-Duck Survey Routes in Louisiana

Routes recording Black-bellied Whistling-Duck in Louisiana.
Shaw4320242007
Forked Island 23920112010
Ramah2920242011
Esther2820242007
Baton Rouge2720242018
Ltl Chenier2320242002
Sabine Nwr1920082001
Kaplan1620232008
Brousville1320242014
Belair1220242008
Hackberry 21220242019
River Road920242014
Richard920232007
Woodlawn720212011
Pearl River720242021
Mayflower620232018
Gibson620192013
Port Allen620242009
Forked Island620242008
Kraemer620242006
Frogmore420232013
Derry 2420242021
Atchafalaya320242012
Plettenberg320212021
Vinton 2320242022

Black-bellied Whistling-Duck Population Trend in Other States

alabamaarizonaarkansasfloridageorgiaindianamississippimissourinebraskaoklahomasouth-carolinatennesseetexas

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