Blackboy spears. Sometimes you see these with many different types of butterfies, probably numbering in the hundreds, flying around them. They do not fly in a loose pack but rather form a sort of butterfly aura around the lenght of the flower.
Blackboys are pretty well adapted to fire and are extremely flammable and fierce burning. Once burnt the fronds add to the height of the trunk by becoming part of it. The flammability also ensures that periodically the undergrowth around them is torched, leaving them with no competition.