I've never been ill from eating yew berries but I'll probably just stay away from them altogether as the tree is so toxic. I know there are some wild plants out there that can do damage to your liver or kidneys... I'll just stick with the plants I know about.
I have tried other berries although I've not eaten them I've just gave them a little taste then spit them out just to see and some taste sweet and edible but I guess just because something tastes good may not necessarily mean that its edible.
I have a book on wild mushrooms and so many look the same, like there is a very poisonous mushroom that looks the same as a harmless edible mushroom in my mushroom book, that just put me right off mushroom picking. The only mushroom I know off is the ink cap mushrooms but as for others I stay away from.
