This article or section contains information derived from Co-op Missions, and should not be considered part of the official StarCraft storyline.
Bel'shir gliders are large, floating whale-like creatures native to Bel'shir. They contain terrazine in their bodies, which is able to be extracted from them through use of an extraction device.
During the End War, Amon's Forces attacked Bel'shir, and began to extract terrazine from two Bel'shir gliders. Egon Stetmann requested that the allied commandeers that were helping him with his terrazine harvesting operation free the gliders.
Stetmann mentioned that he did not remember seeing them on Bel'shir before the conflict with Amon's forces.
Years later, Stetmann returned to Bel'Shir with Gary, and the gliders were once again imprisoned by Amon's Forces. Gary used the rescue of the gliders as a test of Gary's empathy.