The bird's inability to enunciate certain letters (presumably due to having a beak instead of lips) is the reason for the pronunciation of his famous catch-phrase that forms part of this cartoon's title (as in "I Thought I Saw a Pussy Cat"). This is the first film whose title included Tweety's speech-impaired term for a cat. The "standard" spelling was eventually changed from "putty tat" to "puddy tat".