Cassowaries have a reputation for being dangerous to people and animals, and are often regarded as aggressive. The birds can jump quite high and kick powerfully with their blade-like claws. However, deadly encounters with cassowaries are rare. Only two human deaths have been reported since 1900. A 2003 historical study of 221 cassowary attacks showed that 150 had been against humans: 75% of these had been from cassowaries that had been fed by people, 71% of the time the bird had 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 their natural food sources, 15% involved defending themselves from attack, and 7% involved defending their chicks or eggs. Only one human death was reported among those 150 attacks.