Tweety is an animated character, a yellow canary bird in the Warner Bros. Looney Tunes and Merrie Melodies series of animated cartoons. Tweety was originally created not as a domestic canary, but as a generic (and wild) baby bird in an outdoor nest: naked (pink), jowly, and also far more aggressive and saucy, as opposed to the later, better-known version of him as a less hot-tempered (but still somewhat ornery) yellow canary.

Source: Wikipedia