Kakapo: This is not only the rarest, but the strangest parrot in the world. Imagine a rather portly nocturnal bird that never flies, preferring to hike through hilly forest for miles every night. It weighs in as the heaviest parrot in the world at 8 pounds. Imagine this and you have the very real (but virtually extinct) kakapo. A resident of New Zealand, which is home to a number of rare birds, there are only 126 kakapos remaining on earth, up from 65.