The Bowerbird's Decorated Stage
In the forests of Australia and New Guinea lives a bird that builds an art show. The male bowerbird does not make a nest. Instead, he builds a structure called a bower, only to impress a female.
Different kinds of bowerbirds make different kinds of bowers. One kind builds an avenue, two walls of sticks that make a little lane. Another stacks twigs around a central post, like a tiny hut. The bird works hard to keep the bower neat, and he clears the ground in front of it.
Then he decorates. Some bowerbirds collect blue objects such as berries, feathers and bottle caps. Others choose shells, flowers or bright leaves. He puts the pieces in just the right places, and he may swap them when they fade. Some males even paint the walls with chewed fruit.
When a female visits, the male dances and makes loud calls. She looks at the bower and at his show. If she likes what she sees, she may choose him as a mate. Then she builds a nest of her own, away from the bower, and raises her chicks alone.
The bower has just one job. It is a stage that shows how healthy and careful the male is.