Meet the Peacock spider (Maratus volans) - a species of jumping spider native to eastern Australia. Only 5mm in length, it is only the males that have this bright colouring. 

The males also have extensions on their abdomen that can be folded down. They use these to display their colours and markings to females, earning them their name of ‘peacock’. The male will first raise his abdomen, then raise his flaps forming a veritable field of colour. The male will then vibrate his raised legs and tail and dance from one side to another in an attempt to impress the female. [x]