10: Southern Cassowary
The only flightless bird native to Australia, the cassowary can grow to over six feet tall and weigh nearly 190 pounds. Travelers can spot cassowary in their native habitat at Australia’s Daintree National Park. Though cassowary dine exclusively on fruit, caution should be exercised around them. They’ve earned a reputation as "the most dangerous bird in the world," thanks to razor-sharp talons that they will use to defend themselves against dogs and people who tread too closely.