rüppell's parrot is 22–25 cm (9 in) long and weighs 121–156 g. it has an overall dark brown color and its head is dark greyish. both adult male and female birds have some yellow feathers on the leading edge of the wings, and yellow feathers covering their upper legs; in immature birds, the yellow is dull or missing. they are sexually dimorphic; adult female birds have blue feathers on the lower back and the rump, whilst male birds lose this blue feather coloration as they become mature.