The coloured Gouldian Finch (Chloebia gouldiae) is a small bird with three separate forms. The most common is the black-headed form, followed by the red-headed form. The yellow-headed form is the rarest.
The different colours of the feathering on their faces is the only difference, as the rest of the plumage of the three forms is the same. They have a mixture of pale blue, yellow and purple, with grass-green backs and wings.
The following images of the Gouldian Finches at a water source just south of Larrimah in the Northern Territory, show a number of immature birds, as well as some starting to gain their colouration.
The following photos are of the immature Gouldian Finch, starting to colour up and will be the red-headed form of the species.