Blue fungi in my garden

Well that was a surprise, blue fungi in my garden. I've never seen them before and have no idea what they are, so if anyone knows I'd be very interested.

thanks to mollyblobs this would appear to be an introduced fungus Stropharia Aeruginosa, commonly known as The Verdigris Agaric - not sure how common it is in NZ,  or how it ended up in my garden.

Will watch them and see what they do over the next couple of days. I'm away Friday, funnily enough on a fungi hunt - probably won't see any as interesting!