Birdo is Yoshi's girlfriend in the Mario series. Her first game was Super Mario Bros 2, or Doki Doki Panic. In this game, the credits accidentally called her Ostro. She used to be a bad guy, but is now a good guy. She has some gender confusion. Her nickname is Birdetta. Birdo was in the Super Mario Bros. Super Show! There are several colors of Birdos, and they are probably a sub-species of Yoshis.