I noticed almonds are on this list:
Almond Plants / Seeds / plant-pan allergen profilin can cause serious reaction in some birds: Generally all plants of the Prunus genus EXCEPT the pulp of the fruit contain amygdalin or related glycosides which are slowly hydrolyzed to hydrocyanic acid. Some allergic reactions to almond nuts have been observed.
This can't be true for all birds, can it? Or maybe some birds within the same species are alergice to them, just like some humans are? I used to feed my bird almonds all the time before he passed away. He'd mainly break it apart but would eat a little of it. He really, really loved almonds. I still feed almonds to my other bird once in a while. I never noticed anything unusual after feeding them that would indicate an allergic reaction.