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I'm not a mycologist (a person who studies mushrooms), but I do have an appreciation for mushrooms. For weeks I've being seeing scores of them on my woodland walks and along the edges of my own back yard.
You can learn to identify mushrooms that are safe to eat, but I've read too many news stories about people who have come very close to dying by ingesting what they thought were safe mushrooms. It's not a chance I'm willing to take.
If you want to learn more, you'll find a wealth of information and some excellent books at AmericanMushrooms.com. But stay safe and pick your mushrooms at the farmer's market or local grocery store instead.