Tweeter

A Tweeter is a strange, winged bird-like creature that wears a mask and appears in Super Mario Bros. 2. Although they have wings, Tweeters cannot fly; however they are very good at hopping across the ground. Tweeters (like Shy Guys and Ninjis) are easy to pick up and throw at other enemies.

Interestingly, Tweeters were going to appear in Super Mario World 2: Yoshi's Island. Sadly, they were removed from the final version of the game.