A small brown owl native to Australia, known for its distinctive two-note call that sounds like 'boo-book,' which gives the bird its common name.
Onomatopoeia from the bird's distinctive call that sounds like 'boo-book,' repeated. The name was given by indigenous Australians and became the English common name for the species *Ninox boobook*.
The boobook's call literally named itself—people heard 'boo-book, boo-book' coming from the Australian bush at night and that's what they called it! Nature's own naming system!
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