Fairy Ring

Working on the rule of if when you have a choice of shots choose the one which is unlikely to be repeatable I spotted this "Fairy Ring" on the lawn.  Unlikely to be repeatable because the "wee beasties of the night" have already started to eat it.

I am no expert with fungi, in fact, I am barely a beginner.  The first thing I should say is that the Fungi in real life are more orange than they seem here. 

I tentatively identify this as a ring of Orange Grisette  (Amanita crocea) but I am very happy to be corrected if anybody knows what they really are.