BirdAnalyst
Species · BCR 36 · BBS 2025 Release · 1966–2024

Fulvous Whistling-Duck In Tamaulipan Brushlands

All regionsTamaulipan BrushlandsWaterfowl

Fulvous Whistling-Duck in Tamaulipan Brushlands has edged down: down 23% on the route-weighted index since 1971.

-23%Since 1971
6Routes In Region
46Years

Notable Signals

No notable trend signals for Fulvous Whistling-Duck in Tamaulipan Brushlands. See the full index history below.

Forecast

If the recent trend holds, Fulvous Whistling-Duck in Tamaulipan Brushlands is projected to rise about 536% by 2029 — from 0.33 in 2024 to a central estimate of 2.1 (95% range 0.00–8.4). A 5-year backtest shows a typical error of ±200.5%, with 100% of held-out values landing inside the 95% band.

+536%Change by 2029
2.1Projected 2029 index
0.00–8.495% range
±200.5%Backtest error
19692029
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
20252.10.008.3
20262.10.008.4
20272.10.008.4
20282.10.008.4
20292.10.008.4

Routes In Tamaulipan Brushlands

Routes recording Fulvous Whistling-Duck in Tamaulipan Brushlands.
ProgresoTEXAS242008
HeidelbergTEXAS212023
KingsvilleTEXAS82019
RaymondvilleTEXAS42024
SejitaTEXAS32021
GuerraTEXAS21988

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