Not as lucky as one might think. When we stayed in Mather Campground in the Grand Canyon Village again a few weeks ago, the rangers were warning people to leave nothing on their picnic tables , ESPECIALLY shiny objects, as a raven had made off with someone's car keys, again. Not common, but not unheard of. In the extremely unlikely event we ever make it to New Zealand, I'll make sure to rent a Toyota to at least eliminate the chance of irony.