Wamu

From Sonic Retro

The Wamu is a flying caterpillar robot found floating around in Angel Island Zone (Sonic Advance). It is strongly based on the Catakiller, Jr. from Sonic 3. The only way to destroy them is by attacking their heads. Jumping anywhere else will inflict damage.

Sonic Advance Enemies
Drisame | Gamigami | Hanabii | Kerokero | Kiki | Kuraa | Leon | Mirror | Mogu | Oct | Pen | Pierrot | Rhinotank | Senbon | Slot | Stinger | Tentou | Wamu | Yukimaru
Sonic Advance Bosses
Egg Hammer Tank (NGHZ) | Egg Press (SBZ) | Egg Ball (CPZ) | Egg Spider (IMZ) | Mecha Knuckles (AIZ) | Egg Snake (CAZ) | Egg X (XZ) | The Moon Zone