The feature of these birds is the structure made of twigs. Many scientists compare their behavior with humans. Indeed, something is common among them. These animals could kill living creatures to decorate their home as humans do.
Sometimes they paint bowers with fruits and the more beautiful the design is the more likely that the female will choose the male.
When everything is ready the male starts to sing a serenade for the female. So, if they like the male she stays, if not they fly away.
If they like, they leave the bower and go to build a nest.
Males do not participate in the upbringing of the babies. One male could mate with many females.
All the trinkets could be used to compare with each other. And they do everything to achieve their goal.
Such an interesting story.