Is It True That Magpies Like to Collect Stained Things?

We get told that magpies like to collect milk bottle caps and shiny jewelry. Is that true? Soi go give myself o trouble on this one. That originates from a french play. But it is purely a rumor. We've done studies looking at magpies and how they respond when presented with different kinds of novel objects. And we find that, in fact, shiny objects rilly freak them out. If you just, if you give them piles of different things to choose between, they stay the farthest away from the shiny stuff to begin with.