Curly-tailed blue nose

A Curly-Tailed Blue Nose is is a Spirit World creature resembling a primate. Since Aang recognized it when he was in the Spirit World, it is possible they also exist in one of the four nations.

Appearances
When Aang is looking for Koh in the Spirit World, he hears a sound which he discovers came from a curly-tailed blue nose near the entrance to Koh's Lair. After the blue nose turns around, he realizes that it's face has been stolen.