At Mount Whitfield, near Cairns Airport, walking trails have been closed because of the frequency of attacks by two birds that live on the mountain. The birds migrated there during a drought 20 years ago. Local people fed them and they stayed. Now the mountain is cut off from suitable cassowary habitat by deforestation and development. The birds, which nomally feed on fruit that falls from trees are now almost entirely dependent on humans for food and water. The cassowaries are more likely to cause cuts and scratches than life-threatening wounds, but they can kill.