The bowerbird is unusual to say the least. A fancy structure is built by the male to attract females. It is an arch of still growing undergrowth with a walk through from one side to the other. In the middle and to one side is a collection of leaves, fruit, shells, dead insects and odd glistening objects manufactured by humans. When a female is in range the male "screeches" at the female to make her look at his handiwork. Males often wave fruit at females. The male stays in the area of the bower for up to ten years so he has an investment in that location. Researchers have found that males do not just pick up fruit laying around. The spotted bowerbird actually grows his own fruit. As the male tends to his "plot" he throws out dried fruit of the bush tomato and clears the ground, thus leaving healthy seeds to sprout and grow into bushes. The area around the bower is full of bushes in fruit with green tomatoes. This symbiosis is part of the bowerbird