The world's most dangerous bird ━━━━━━ ⚫ ━━━━━━ Cassowary Attacks – Despite their reputation of aggression, cassowary attacks are largely due to human error. A study of these attacks showed that 75% of the birds had been fed by humans, and only 15% of the attacks involved kicks. There is only one documented instance of a cassowary killing a human. In April of 1926, two teenaged brothers attacked a cassowary on their property with clubs. One of the boys fell, and the bird kicked him in the neck. It is easy to see that humans instigate many attacks from cassowaries.