What really astounds me is how many underestimate the risks of eating unknown mushrooms.
There are NO empirical methods to tell one edible mushroom from a poisonus one!
All the pseudo rules to tell an edible mushroom (except direct and deep knowledge) are basically BULLS...!!!!!
The fact a critter can eat it means absolutely NOTHING !!! The human digestive system has substancial differences from digestive systems of other animals.
Long exposure to heat (cooking) could in some case deactivate some toxines but in many cases wont
Poisons from mushrooms can have a very wide range of effects.
Even if obviously a fast dead seems the worst you must take into account that also a slow, cumulative, irreversible, painful and radical damage to many vital organs is very possible.
So even eating small portion and assuming it is safe to eat because there have been no issues is WRONG
The only rule with mushrooms is :
You are not 200% sure it is edible? DO NOT EAT
On top of that mushrooms are mostly water, minerals and fibers so they provide almost nothing in term of energy. Why take the risk???
I've been mushrooms picking for many years with a mychologist , author of books, and in many occasions he showed me mushrooms that for special conditons showed characters differents from their standard that could lead to improper classification and tragic mistakes
once again:
You are not 200% sure it is edible? DO NOT EAT