Two mushrooms I photographed in Shindagin Hollow State Forest a few miles from my farm.
@UP8 it's possibly Amanita jacksonii https://www.mushroom-appreciation.com/caesar-mushrooms.html
@mjambon i don't think that the cap opens up when it gets bigger
my Polish relatives taught me to pick quite a few Boletus (no gills) mushrooms but never anything red
@UP8 you can tell they're amanitas because we can see the edge of the volva on the specimen in the back (the white sac at the base). They should open up unless something goes really wrong for them because that's how amanitas release their spores.
@mjambon now that i think of it i have seen red mushrooms that look like the photo in the web page you linked in that area, and not the very common Muscaria
@UP8 by the way, if you're adventurous and finding many A. muscaria, they can be prepared to be safe to eat by parboiling in plenty of water 5+ min twice and discarding the water each time. (some people are interested in the psychoactive effects but prep and use are trickier)
@mjambon I know people who eat A. Muscaria and swear they like the expereience; my grandfather though told me to stay away from them and told me they are called in Polish "Mohu Mori" which means "Death to Flies"
@UP8 my main problem is to find them where I live (a drier area in northern California) but I think I found a promising area to explore in the fall.
@mjambon they are all over New England and New York
