A 75-year-old man in Florida, US, was killed by a large flightless 'Cassowary' bird he owned when it attacked him after he fell. The San Diego Zoo's website calls cassowaries the "world's most dangerous bird" with 10-cm dagger-like claws. Native to Australia and Papua New Guinea, cassowaries can be up to 6-foot tall and weigh up to 60 kgs.