[huntress]

Raw peanuts of non human quality often carry a mold fungus on the shell that can be dangerous. Raw nuts are always best. Peanuts are not nuts - they are in fact a legume (or root). Parrots would not eat peanuts in the wild anyway. I feed only human grade packaged raw peanuts as a treat and don't worry about shelled peanuts in packaged bird food (theoretically considered safe) I don't feed any peanuts that don't look clean and bright. All other TREE nuts are considered safe and Macaws need some of these in their diet but remember balance and moderation.
tree nuts in the shell are in fact a great foraging food. My Mac can crack anything even the Brazils whereas My greys can only do Almonds or smaller.
An occasional roasted UNSALTED nut is OK as well but lack most nutritional value and just all the fat,lol. Certain birds who tend to have fat problems like Amazons should be limited.
I always say try to replicate as close as possible to what your species would eat in the wild.