Sly-Bird is the bird companion of Commander Stargazer.
Sly-Bird appears to be a completely robotic bird, similar to the fighting hawks. His exact date of creation is unknown.
Sly-Bird can fly both in atmosphere as well as the "space" of Limbo. He is built for surveillance not combat, and has no known weapons of any kind, depending upon flight to escape. He has a large camera lens on his stomach, enabling him to take pictures of anything he flies over without having to look at it with his eyes. It is unclear if Tally Hawk has or Sly-Bird has the more sophisticated or powerful surveillance equipment, but Tally Hawk has greater combat abilities, meaning that he will most likely survive to bring back information.