Family: Anatidae (Ducks, Geese, Swans)

Authority: Humphrey & Thompson, 1981

Red List Category

Criteria: C2a(ii)

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Justification of Red List category
This species was previously classified as Near Threatened as, although it has a single, small population, it was not thought to be declining. It is now thought to be experiencing a continuing decline owing to deteriorating habitat quality, and probable decreases in survival and breeding success, as caused by human activities and other problematic species, and it has therefore been uplisted to Vulnerable.

Population size: 3400-3700 mature individuals

Population trend: decreasing

Extent of occurrence (breeding/resident): 130,000 km²

Country endemic: yes

Attributes
Land-mass type - continent
Realm - Neotropical
IUCN System - Marine