We get mushrooms here, but they're just your run of the mill 'shrooms. Those, however...I think I'd be tempted to go out at night with a flashlight, sneak up and see who or what may visit them, or dance around them...
I envy those who are knowledgeable enough to go harvesting wild 'shrooms. when we lived in Washington, there was a lot of 'shroom hunting, when we lived in Iowa there was a lot and when we lived in NorCal, we had an old gypsy lady neighbor who would go gather 'shrooms in the hill pastures by us. I would never be tempted to collect my own...and I know I'd never eat one of those beauties you have there....lol..