Thanks for responding, both here and personally. I confess to confusion. As I look now at this forum, the link in your first post and in the portion of yours that I quoted is abbreviated, incorrectly hyperlinked, and doesn't link me to anything when I click on it. Does it really work for you? If so, I wonder why not for me??? A question for Damian...
I must admit to befuddlement at seeing that, as you say, the UC-Davis list has NOTHING on it that's coded 5. Why then, I wonder, do it describe code 5? And how could I have used this site for many years for no reason but my parrots' safety without noticing this? Yet again, not questions for you, but ones I'm asking myself. I wonder if the list has been revised and items that used to be coded 5 no longer are. Apple seed aren't a good example IMO because so many good bird folks insist a few seed do no harm. Nor is avocado IMO because so many insist it's only the bruised or overripe avocado that's harmful to birds. But I've always read how dangerous poinsettia and elephant ears are to animals (other than humans), and they too are listed but not coded 5. I can't figure it out.
So, I called the 800# to request the publication noted on the site that lists plants that are toxic to animals. Since I'm not in California, the 800# didn't work for me. So, I emailed the list author and asked for the publication. I'll post a follow-up if I learn more. Meantime, I'm scratching my head and assure you I wasn't the least bit offended at any point. I wanted to understand what you were saying, so I was asking questions. I should have looked for some code 5 items first!
Thanks

PS Sunday afternoon and the link is now complete and clickable, at least in this post and yours that I've quoted. Thanks, Damian!