From the Super Mario Wiki
Cluckbooms are enemies appearing in Super Mario Galaxy and Super Mario Galaxy 2. They are chickens that lay eggs that will explode after a few seconds when layed. They are orange and black in appearance and have the ability of flight. A well aimed Star Bit can bring them to the ground for the player to hit them. They are only found in Dusty Dune Galaxy in the original game. Super Mario Galaxy 2 had them in Slipsand Galaxy.
Names in other languages
||Portemanteau of "bomba" (bomb) and "gallo" (rooster)