The Lord Derby's parakeet (Psittacula derbiana), also known as Derbyan parakeet, commemorates Edward Stanley, 13th Earl of Derby. The adult male and female are easily distinguished because they have different beak colours and slightly different plumage. A rare breed, it is endemic to Southeastern Tibet, northeastern India and southwestern China; and is now confined to small pockets of moist evergreen forest in the hills of the Indian state of Arunachal Pradesh and the Chinese province on its border. Larger than most parakeets it is similar in size to the popular Alexandrine Parakeet. Males have a red upper beak, while the females have an entirely black beak.