BirdAnalyst
Species · BCR 34 · BBS 2025 Release · 1966–2024

Black-bellied Whistling-Duck In Sierra Madre Occidental

All regionsSierra Madre OccidentalWaterfowl

Black-bellied Whistling-Duck in Sierra Madre Occidental has fallen sharply: down 50% on the route-weighted index since 1989.

-50%Since 1989
3Routes In Region
16Years

Notable Signals

long arc declinecomputed index

Black-bellied Whistling-Duck has fallen sharply in Sierra Madre Occidental: down 50% on the route-weighted index since 1989.

Routes In Sierra Madre Occidental

Routes recording Black-bellied Whistling-Duck in Sierra Madre Occidental.
Peña BlancaARIZONA21997
AmadoARIZONA22014
PatagoniaARIZONA12012

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