Sand Bird

The Sand Bird is a bird creature that Mario encounters during Super Mario Sunshine. It originally appears as an egg, but ultimately hatches during the events of the game. When hatched, the Sand Bird resembles an entity composed of Sand Blocks, arranged in a shape reminiscent of an actual bird. Although the Sand Bird does not seem to possess any outstanding biological characteristics, it is a living creature and capable of movement and producing screech noises.

Prior to hatching, the egg is kept inside a structure on Isle Delfino's Gelato Beach, known as the Shine Tower. Three large mirrors are situated around the building, reflecting sunlight into a device on the tower's top that keeps the Sand Bird egg warm and healthy. This process has been going on for more than a century. The Shine Tower and the Sand Bird egg are supervised by a Pianta professor, who can be found near the structure most of the time.

''Super Mario Sunshine
The Sand Bird plays an integral role during episode two and four of Gelato Beach. During the second episode, "Mirror Madness! Tilt, Slam, Bam!", the Sand Bird egg is disturbed by a giant Wiggler and creatures known as Plungelos. The Wiggler is occupying the device on top of the Shine Tower while the Plungelos are setting the mirrors out of focus, thereby robbing the egg of its warmth. Mario is tasked with restoring the original condition of the structure and getting rid of the intruders to ensure the egg's safety.

The Sand Bird then finally hatches in between the episodes three and four, breaking out of the Shine Tower and flying away. During episode four, "The Sand Bird is Born", the newly hatched Sand Bird can be found soaring high above the ground, circling a tower. Mario can access this place by leaping through the hole in the Shine Tower's roof and into the broken remains of the Sand Bird egg. By doing this, the player is presented with a red coin challenge. Mario needs to collect eight red coins while trying to not fall off the moving bird. At two points during the flight, the bird will tilt its body in a 90° angle, requiring Mario to adjust his footing accordingly. Seven of the red coins can be found on the bird's neck, wings, and tail. The eighth one is located on top of the large tower in the center of this area, and can only accessed once the Sand Bird reaches the end of its course, at which point it will dive and start from the beginning again.

The Sand Bird does not make another appearance after that. The remains of its egg can still be viewed inside the Shine Tower, but access to it has been blocked by a wooden grate.

Trivia

 * The event when the Sand Bird flies among towers in the sky resembles the Tower of the Wing Cap from Super Mario 64.