The Rainbow Lorikeet was accidentally released into the southwest of the state of Western Australia from the University of Western Australia in the 1960s and they have since been classified as a pest.
Rainbow Lorikeets travel together as pairs mostly and often pick up calls to fly as a flock, then dispersing again in to pairs. Rainbow Lorikeets pairs dominate their feeding areas against other pairs. They chase off not only smaller birds such as the stealthful Australian Miner, they also chase off larger and powerful birds such as Magpies. Although individual Rainbow Lorikeets are difficult to distinguish by their plumage they are possible to distinguish by their behaviour, size and eye colour differences at the very outside of the iris.
They feed mainly on pollen and nectar, and possess a tongue adapted especially for their particular diet. The end of the tongue is equipped with a papillate appendage adapted to collecting nectar from flowers.