Tailbunker

The Tailbunker (テイルバンカー) is a Heartless boss which appears at Twilight Town in Kingdom Hearts 358/2 Days. It resembles a giant blue-green Wyvern.

Kingdom Hearts 358/2 Days
These large aerial Heartless are hard to hit in mid-flight.

Strike their wings and tail to force them to land, then target the head, which is susceptible to Blizzard magic.