Gouldian Finch: Found in the wild in the tropical savanna woodlands of Northern Australia, these colorful birds have grass green backs, yellow bellies, lilac breasts, and turquoise blue rumps and neck markings. Individuals may vary by having either a red, black or yellow head. A very popular bird among aviculturalists, controlled breeding has produced a wide variety of additional color mutations. Recent estimates suggest that less than 2500 Gouldian finches remain in the wild.
It is debated whether most or all Blue Gouldians have a genetic immune system fault that means they can only be kept alive in very clean, climate controlled environments. Description from finchstuff.com. I searched for this on bing.com/images