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The cassowary is a very large flightless bird native to the tropical forests of New Guinea, nearby islands and northeastern Australia. The Southern Cassowary is the third tallest and second heaviest living bird, smaller only than the Ostrich and Emu.

Cassowaries feed mainly on fruits, though all species are truly omnivorous and will take a range of other plant food including shoots, grass seeds, and fungi in addition to invertebrates and small vertebrates. Cassowaries are very shy, but when disturbed, they are capable of inflicting serious injuries to dogs and children.

Cassowaries have a reputation for being dangerous to people and domestic animals. The 2007 edition of the Guinness World Records lists the cassowary as the world's most dangerous bird. During World War II American and Australian troops stationed in New Guinea were warned to steer clear of them. Many internet entries about cassowaries state that they can disembowel a human or dog with one kick, with the long second toe claw cutting the gut open.

In his book "Living Birds of the World" from 1958, Ornithologist Thomas E. Gilliard wrote;

"The inner or second of the three toes is fitted with a long, straight, murderous nail which can sever an arm or eviscerate an abdomen with ease. There are many records of natives being killed by this bird."

However, Gilliard did not include any such records or any references for them, and although this assessment of the danger posed by cassowaries has been repeated in print by authors including Gregory S. Paul (1988) and Jared Diamond (1997), recent research on hundreds of cassowary attacks has only been able to find one human death. A 2003 study of attacks by the Southern Cassowary in Queensland found no wounds larger than punctures about 1.5 centimeters in diameter. Of 221 attacks studied, 150 were against humans. 75% of these were from cassowaries that had been fed by people. 71% of the time the bird chased or charged the victim. 15% of the time they kicked. Of the attacks, 73% involved the birds expecting or snatching food, 5% involved defending natural food sources, 15% involved defending themselves from attack, 7% involved defending their chicks or eggs. Of all 150 attacks there was only one human death.

The one documented human death caused by a cassowary was that of Phillip McClean, aged 16, and it happened on 6 April 1926. He and his brother, aged 13, were attempting to beat the cassowary to death with clubs. They were accompanied by their dog. The bird kicked the younger boy, who fell and ran away. Then the older boy struck the bird. The bird charged and knocked the older boy to the ground. While on the ground, Phillip was kicked in the neck, opening a 1.25 centimeter wound. Phillip got up and ran but died shortly afterwards from the hemorrhaging blood vessel in his neck.

Cassowary strikes to the abdomen are among the rarest of all, but there is one case of a dog that was kicked in the belly in 1995. The blow left no puncture, but there was severe bruising. The dog later died from an apparent intestinal rupture.
Source from wiki