Air sac mites! I hate those!!!! I had a gouldian infect my entire aviary once! I sold her, and treated everyone in my aviary, now everyone is fine. But I only own one gouldian male b/c gouldians are just to high maintance for me. It's kind of the same as me knowing I'm heterosexual, b/c I don't like high maintenance, and woman (most) are high maintenance.
My favorite finch is the society finch by far. I love animals that just get along with everyone, are good parents, are not to loud and just cuddle up! They are easy to breed, and there are so many variations. Like I said in a previous post, I just got a new pearl society and self fawn society, and they are gorgeous! I also have a chocolate self, a fawn pied, and a chocolate with white on just the tip of it's wings (this one is a baby from a previous clutch I had, I loved him to much to sell him).
I also really love the rosy rump. Mine lost his mate in August of this year, and has been sad ever since. But the societies allow him to preen them. I'm looking for another one, but they are hard to find here. Everyone has red ears, and I don't know if getting one red ear would be sufficient... I want him to have a cuddle buddy at night.