Nivawk

Nivawk was a large, hawk-like Rahi of an unknown species. However, It was not a dangerous predator. Instead of hunting, it would scavenge for food, making it like a robotic vulture.

When Teridax came to Metru Nui to pose as Turaga Dume, he used Nivawk to spy on his enemies. During the Great Cataclysm, Teridax absorbed Nivawk, along with Nidhiki and Krekka into his essence, so he could shapeshift into a more powerful form.

Nivawk didn't became a dark spawn warrior or lord, due to it not being a hostle creature, and was release back to it's home world, till found by Emperor Fnag who tamed the creature to serve as his pet and spy.