First off, I did LOTS of research, and asked many questions. They are legal to have in the US, and are not a CITES species. A species of "Least Concern", native to Mexico.

They are about the size of a large canary. They are FLIGHTY, and take a while to settle in. They require lots of flying space. Diet is seed, insects, and the occasional apple.
Very cool, beautiful birds! Have not seen them in the US in over a decade.
Enjoy!