The Lord Derby’s parakeet (Psittacula derbiana), also known as Derbyan parakeet, is a monotypic parrot species, which is confined to small pocket of moist evergreen forest in the hills of the Indian state of Arunachal Pradesh and the adjoining parts of Tibet. The species suffers from poaching for the illegal wildlife trade and fetches a high price in the black market. The adult male and female are easily distinguished because they have different beak colours and slightly different plumage.
Lord Derby’s parakeets are average 20 inches (50 centimeters) in length and are sexually dimorphic. They have a mostly green plumage over their dorsal surface (i.e. from behind), black lores and lower cheeks, a bluish-purple crown and pale yellow eyes. The throat, breast, abdomen and under-wing coverts are greyish blue to lavender. Male birds have a red upper mandible with a yellow tip, while the lower mandible is black. The females have an all-black beak.