Fly Agaric is the common name of the species Amanita muscaria. It is native to temperate and sub-arctic (boreal) regions of the Northern Hemisphere. It is a mushroom with a white stalk and red cap with white spots (actually growths called warts). There are many varieties which have different colored caps. It is the mushroom species thought up when one thinks of a mushroom. It is usually found growing near birches, pines, spruces, or firs and usually emerge in autumn.