The local Satin Bowerbird and I are having fun. If I place items near or within a few metres of the bower he throws them out. So I am leaving blue things 50m. away and he takes them within a few hours.
The first offering was a star cut from an old plastic plant pot. He arranged it near his favourite peg.
Offering number two was made in his own image. He picked it up quickly and added it to a new section of the bower near the star.
These selected items seem to be in a "special " section away from the ordinary stuff.