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Amanita Vaginata, or Grisette? Check base for volva.
Leucocoprinus birnbaumii
I think it is poisonous
Choice mushroom, Chicken Mushroom, or Sulphur Shelf, Laetiporus
http://www.mushroomexpert.com/laetiporus...
I cannot see much of the underside or the stem very sharp, but it looks like a tube or pore mushroom and might be a bolete. As there are many kinds and also not so nice look-alikes, I suggest to google more info and do some tests, such as cutting and checking for bruising, staining etc.
Imitating a butterfly, unbelieveably crafty!
