Nishan, a Pharoh Eagle Owl, was user OdelayOwl's first Guardians of Ga'hoole OC. He appears in the unfinished story Tunnel Owls, which is very loosely based on Guardians of Ga'hoole.
In Tunnel Owls, Nishan lives with his friend Vera, a Marsh Owl, in the smuggling tunnels between Gaza and Egypt. They'd live underground all their lives, until they were forced to leave after the triggering of land mines. The story has yet to be finished. Nishan bares no unique markings for his species.