Boobook calls were apparently heard on the island until the 1950s, but during the 1920s boobooks from near Sydney in eastern Australia had been introduced, along with Barn and Masked Owls, in an unsuccessful effort to control the Black Rats that had overrun the island.
Threatened fauna found on Mount Zero-Taravale include the Southern Cassowary, Masked Owl, Northern Bettong and Northern Quoll.
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