Pionus anyone?

It doesn't look like anyone here has a Pionus, or cares to post about them, but I am very interested in learning what I can about them, if you have good links or information, please pass them on.
Thank you.

I don't have any but I've raised Blueheaded and whitecaps, I love them and find that the blueheads are calmer and less hormonal than the whitecaps which can be more amazon like in personality. They are also very sensitive to aspergillus infections and weight problems. I believe Rosemary Low has written a book about them, some of there dietary needs and behavior differ from that of other parrots.