Keese Swarm

Swirly Bats are enemies from The Legend of Zelda: Four Swords Adventures. They can be found in the The Swamp and Lost Woods stages.

Swirly Bats are comprised of a leader, with an appearance similar to Vire, followed by purple Keese. Swirly Bats hide in pots and grass, thus only showing up if the pot or grass they are in is destroyed or cut. They do not directly attack Link, but instead encompass him. The path is determined by the leader, which remains a certain distance from Link. Because of this distance, it is impossible for Link to attack the Swirly Bat with his sword. Arrows also pass under the Swirly Bat causing no damage. Running into the wall formed by the trailing Keese will damage Link.