Wie hängen sie zusammen

The filigree feathers on the flanks of the male blue bird of paradise, whose bellows are kept on a stick, shimmer sky blue. This allows scientists to view the specimen from all sides without touching it. What is not visible in the presentation is that the Blue Bird of Paradise shows off its feathers to the females in an unusual courtship dance. For this, the males hang upside down from a branch and spread the blue decorative feathers into a fan.