Naming
The Congo bay owl was formerly classified as a subspecies of Oriental bay owl due to insufficient knowledge, but it has turned out that it might not even belong to the same genus. The Sri Lanka bay owl was also considered a subspecies.A population of this species has apparently become extinct on Samar Island in the Philippines during the 20th century. It was described as "Phodilus badius riverae" and was only ever known from a single specimen, which was lost in a bombing raid in 1945. The validity of this taxon is uncertain; it is usually synonymized with the nominate subspecies or the subspecies "saturatus"; it might be a distinct species, however.
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