Perhaps a member of the putative M. atricapilla species-group; recent analysis using 3 nuclear genes and 3 mitochondrial genes placed it in clade with M. asio, M. kennicottii, M. cooperi, M. barbarus, M. atricapilla, M. roboratus, M. watsonii, M. guatemalae and M. vermiculatus#R. Formerly considered conspecific with M. atricapilla, but vocally and morphologically distinct, and treatment as separate species further supported by DNA evidence. Taxonomy of Megascops in S Brazil and Argentine province of Misiones remains to be clarified. Name argentinus, which has erroneously been applied to S populations of M. atricapilla, might ultimately prove to be a senior synonym for present species, but fuller investigation needed#R. Name maxima is a synonym of sanctaecatarinae. Monotypic.
SE Brazil (S Paraná, Santa Catarina, Rio Grande do Sul), NE Argentina (Misiones) and N Uruguay#R.
Food and feeding
Status and conservation
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