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What Is a Cassowary? It May be the Most Dangerous Bird in the World

What is a cassowary bird? Learn all about the most dangerous bird in the world including where it lives, what it sounds like, and if the cassowary attacks humans.

ByKatie Liu
(Credit: Wirestock Creators/ Shutterstock)

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Jet black, hair-like feathers. Vivid blue heads adorned with a spongy crest. Most strikingly, a pair of leathery looking feet, armed with a 12 centimeter talon.

This is the cassowary, one of the largest and also most dangerous birds in the world. Though it looks like it walked right out of prehistory, it roams the land Down Under. It’s got a killer reputation – quite literally, as cassowaries are among the few bird species that boasts human fatalities on their rosters.

But how dangerous is the cassowary, really? Here’s what to know about these birds.

(Credit: Honza123/Shutterstock)

Honza123/Shutterstock

There are three species of cassowaries: the Southern Cassowary, Dwarf Cassowary, and Northern Cassowary. Of the three species in the Casuariidae family, the southern cassowary is the largest and most well-known. The title of "the most dangerous bird in the world" is often given to the Southern Cassowary, known for its potentially ...

  • Katie Liu

    Katie Liu is a science journalist covering a variety of topics for Discover, ranging from space to human health to archaeology, among others. Her interest in science writing began during her time at Northwestern University, from where she graduated in 2024.

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