The Lady Gouldian Finch measures about 5 inches from head to tail. Many mutations and suspected mutations exist in aviculture, including: red head, yellow head, black head, purple breast, white breast, lilac breast, blue body, seagreen

 

Sexing

The hen is paler than the cock overall: the color of her back, breast,* and abdomen is less intense, and she has very little if any blue border around her mask. If she is yellow or red headed, she will likely have far more black feathering in her mask than the cock, who only has a thin black border around his mask. When in breeding condition, the hen''s beak will become black (or red or yellow if she is yellow bodied).