To attract a mate, the male bowerbird builds an amazingly complex structure called a bower. It is made of twigs and often shaped like a small hut.
The male bird then decorates his "bachelor pad" bower with a variety of objects as gifts: flowers, feathers, stones, and even bits of discarded plastics and glass. Hundreds of pieces are carefully arranged in monochromatic themes (i.e. all blue items). The bird is so anal that it will get really angry if you mess up its pile (say, by putting one differently colored pebble in its pile).
The male bowerbird spends hours sorting and arranging things. In fact, it will break its focus only to go to a different males’ bowers to steal stuff and mess the place up!
Click here..... David Attenborough on Bowerbird