BirdAnalyst
Species · BCR 37 · BBS 2025 Release · 1966–2024

Fulvous Whistling-Duck In Gulf Coastal Prairie

All regionsGulf Coastal PrairieWaterfowl

Fulvous Whistling-Duck in Gulf Coastal Prairie has surged: up 137% on the route-weighted index since 1969.

+137%Since 1969
38Routes In Region
57Years

Notable Signals

long arc increasecomputed index

Fulvous Whistling-Duck has surged in Gulf Coastal Prairie: up 136% on the route-weighted index since 1969.

Forecast

If the recent trend holds, Fulvous Whistling-Duck in Gulf Coastal Prairie is projected to rise about 226% by 2029 — from 3.8 in 2024 to a central estimate of 12 (95% range 3.0–21). A 5-year backtest shows a typical error of ±132.7%, with 80% of held-out values landing inside the 95% band.

+226%Change by 2029
12Projected 2029 index
3.0–2195% range
±132.7%Backtest error
19672029
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
2025122.421
2026122.621
2027122.721
2028122.921
2029123.021

Routes In Gulf Coastal Prairie

Routes recording Fulvous Whistling-Duck in Gulf Coastal Prairie.
WoodlawnLOUISIANA382021
Loyola Beach 2TEXAS382023
BaysideTEXAS292003
RichardLOUISIANA152024
Ltl Chenier 2LOUISIANA152011
Rock IslandTEXAS142023
KaplanLOUISIANA132023
Ltl ChenierLOUISIANA132024
Forked Island 2LOUISIANA132011
Bayside 2TEXAS132004
MauriceLOUISIANA112024
WinnieTEXAS112024
PetronilaTEXAS102019
StowellTEXAS102021
Goliad PrairieTEXAS102012
Ville PlatteLOUISIANA92019
EstherLOUISIANA62024
Moon Lake 2TEXAS62024
Bayside 3TEXAS62024
Forked IslandLOUISIANA52024
ChinquapinTEXAS52023
Sabine Nwr 2LOUISIANA42015
Vinton 2LOUISIANA42022
Sabine NwrLOUISIANA32008
Hinkles FerTEXAS32010

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