South America between latitudes 27° and 30° S, on the banks of the Paraná and Uruguay Rivers.
Closely related to A. leari and recently suggested as being conspecific#R; further research needed. Monotypic.
Formerly found in E Paraguay, SE Brazil, W Uruguay and N Argentina. Only two records in 20th century and it may well be extinct#R.
Food and feeding
Status and conservation
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