Birdo (Japanese: キャサリン Kyasarin) is a recurring character in the Mario series. In fact, there have been multiple characters known as "Birdo," similar to the multiple Yoshis that have appeared throughout history. The concept of a Birdo character was not solidified until the same pink Birdo began appearing in various spin-off titles. The central Birdo character (that appears in the Mario Kart series, the Mario Party series, and the various sports titles) wears a red bow and a diamond ring. Despite the pink skin and feminine apparel, Birdo is mentioned to be male in the game manual for the original Doki Doki Panic videogame. Birdo also has some sort of relationship with Yoshi, as they are the automatic partners in various competitions. He/She is a good friend of Daisy, Toadette, and Petey Piranha. Other Birdo characters have resided in Subcon, in Nimbus Land, and in other locales.
Birdo is a little female dinosaur, her appearance is similar to Yoshi's, but there are some differences: her skin is pink, she has a large mouth that seems like a trumpet from where she can shot eggs, her eyes are big and oval with three little eyelashes, Birdo has little hands and little feet, which have small white claws, on her left hand she has a diamond ring and on her head she has a beautiful red bow, her stomach is colored white and she has padded feet.
The pads of Birdo's feet are similar to Bowser Jr.'s.