From Destinypedia, the Destiny wiki
Axis Goblins are a more lethal variant of the standard Goblin chassis. They are seen in various Patrols, Public Events, and Missions regarding the Vex. Like most Major class enemies in Destiny 1, Axis Goblins bears the same appearance as the normal Goblins, except their health bar, which is colored yellow rather than the normal red. Axis Goblins are also resilient against certain weapons.
List of appearances