Gouldian Finch

The Gouldian Finch (Chloebia gouldiae), also known as the Lady Gouldian finch, Gould's finch, or the rainbow finch, is a colorful passerine bird that is native to Australia. Black, green, yellow, and red marks can be found on either sex. The colors of the females are typically less vivid. The male's chest is purple, while the female is a paler mauve, which is one obvious difference between the sexes. Gouldian birds measure between 125 and 140 mm.

The heads of Gouldian finches can be red, black, or yellow. It is now understood that what were once thought to be three distinct species of finches are actually color variations that can be found in the wild. Selective breeding has also produced changes in the color of the body and breasts (blue, yellow, and silver instead of a greenback). At the back of the gape, there are a number of "prominent rounded tubercles" with an "opalescent lustre". Even though there is a wealth of scientific evidence to the contrary, these tubercles are frequently (and mistakenly) described as phosphorescent. These tubercles are thought to be reflective only and not luminous.