In North America there is a variant of muscaria found called guesowii, that is known colloquially as the American Yellow Fly Agaric. Also, muscaria can come into season in late summer in that region, whereas in Europe we do not see them until autumn is in full swing at least. If this was found early summer I would consider a different amanita ID to a muscaria as possibly a bit too early :)
In North America there is a variant of muscaria found called guesowii, that is known colloquially as the American Yellow Fly Agaric. Also, muscaria can come into season in late summer in that region, whereas in Europe we do not see them until autumn is in full swing at least. If this was found early summer I would consider a different amanita ID to a muscaria as possibly a bit too early :)