Flaptack

Flaptacks are a type of enemy in the game Super Mario Galaxy 2. They look like oversized blue birds with a yellow spike on their head. When they spot Mario or Luigi, they will float around them for a while. After a few seconds, it will try to stab them with its spike on its head. If it misses, it will be stuck on the ground, defenseless. They can still however be defeated when its still in the air by backflipping and Spinning into them. These enemies can also destroy Cloud Mario or Cloud Luigi's clouds with its spike. They appear in early galaxies such as the Fluffy Bluff Galaxy and Cloudy Court Galaxy, but they appear in later galaxies such as the Flash Black Galaxy.

Trivia

 * Their name is a portmanteau of flap, referring to their bird-like appearance, and tack referring to the sharp spike on their head.