There's no such thing as a vegan.
It is an impossibility to not consume any animal matter. Unless you furiously clean every plant and fungus you consume there will be residual animal stuff on it somewhere. If you are a "vegan" for moral reasons then surely it should be ok to eat animals that were dead when you found them. And what about slime moulds? they're fungus but they crawl around. What about euglena they are mobile and photosynthetic.