Red List Category
for more information about the Red List categories and criteria
Justification of Red List category
This species qualifies as Vulnerable owing to its small, fragmented and declining population (Collar et al
. 1992). There are apparently a large number of small subpopulations, which are mostly declining (especially in Argentina) as a result of changes in water management and possibly deforestation.
2000-2700 mature individuals
Distribution size (breeding/resident):
Land-mass type - continent - Continents are land masses > bigger than Australia (=7,682,300 sq km).
Realm - Neotropical - realm
IUCN Ecosystem -- Freshwater biome
IUCN Ecosystem -- Terrestrial biome