The Double-wattled or Southern Cassowary is the world's second heaviest, third tallest and second most dangerous bird. It comes from North-eastern Australia and southern New Guinea.
The bizarre and colourful bird is heavier than the taller Emu but not as tall/heavy as the Ostrich. The larger females can be 2 metres high. Normally shy and retiring, the vegetarian birds can and will easily kill a large mammal, including humans, if they feel their territory is breached. They can kill with one kick of their heavy feet with a central toe (of 3) that can slash open cars like a knife.
Cassowaries, like Ostriches, Emus and Rheas, are "ratites" -- flightless birds. The strange horn growth like a helmet is said to protect their heads when foraging in their dense forest habitat.