sentences:  The plumage of this "Neophema" species is duller than others and they have a reputation as passive and uninteresting caged specimens.Differentiating the sexes presents difficulties to parrot enthusiasts, with no reliable means available to simple examination in the hand.The rock parrot, also known as the rock grass-parakeet in the bird trade, may be a more desirable specimen when kept as part of a colony, provided with logs simulating tree hollows and fed on "Mesembryanthemum" and "Carpobrotus" species.