The Rainbow Lorikeet is a medium sized parrot, with the length ranging from 25–30 cm (9.8-11.8 in) in size, and has a wingspan of about 17 cm (6.7 in). The weight varies from 75–157 g (2.6–5.5 oz). The plumage of the nominate race, as with all subspecies, is very bright. The head is deep blue with a greenish-yellow nuchal collar, and the rest of the upperparts (wings, back and tail) are deep green. The chest is red with blue-black barring. The belly is deep green, and the thighs and rump are yellow with deep green barring. In flight a yellow wing-bar contrasts clearly with the red underwing coverts. There is little to visually distinguish between the sexes. Juveniles have a black beak which gradually brightens to orange in the adults.
Rainbow lorikeets distribution is mainly over the north-east in Australia Their habitat ranges from forests of all sorts (heathlands, open forests, rainforest, sclerophyll forest) coastal or inland, to any area including urban areas that have suitable trees.