Gouldian finches are also commonly referred to as rainbow finches or simply Goulds. They are among the most brilliantly colored birds in existence. Not sure what to look for? Look for a community of kaleidoscopic colors, and you have found Gouldian finches! The Gouldian finch is an extremely attractive and strikingly colorful bird. There are three distinct color variations in the Gouldian finch, with individuals having either a red, black, or yellow head. All have a wide turquoise band across the back of the head, and the nape and sides of the neck are light green. The finch's back and wings are purple-blue. The lower breast, sides of the body, and abdomen are yellow, fading to white.