sentences:  The budgerigar, or common parakeet ("Melopsittacus undulatus"), is a popular talking-bird species because of their potential for large vocabularies, ease of care and well-socialized demeanor.Between 1954 and 1962, a budgerigar named Sparkie Williams held the record for having the largest vocabulary of a talking bird; at his death, he knew 531 words and 383 sentences.In 1995, a budgerigar named Puck was credited by Guinness World Records as having the largest vocabulary of any bird, at 1,728 words.