Wondering about the most dangerous birds on Earth? We've compiled this list of the Top 20 scariest birds — some that have even attacked people.

Add Yahoo as a preferred source to see more of our stories on Google. A southern cassowary stands on a beach at Etty Bay in Queensland, Australia. These endangered birds can live up to 50 years.

Towering at five and a half feet tall, sprinting up to 31 miles per hour, and leaping up to seven feet off the ground, cassowaries are the stuff of legends. They are the third largest bird in the ...