This week I have seen hundreds of these bright orange and yellow mushrooms in the fir and spruce woods. I found this one and several others this morning while taking my dog for a walk. The mushroom is the fly agaric (Amanita muscaria) and it occurs across the temperate northern hemisphere in cool, moist woods. Fly agaric is an ectomycorrhizal species on the roots of trees. Primary host species are birches (Betula) and pines (Pinus) but it also grows with spruces (Picea) and firs (Abies).
I won’t bother going into details about fly agaric’s toxicity or its psychotropic effects. The internet is overflowing with that already. Amanita muscaria is a beautiful mushroom best appreciated by letting it live undisturbed.