From The Stargate Omnipedia


Large, flying species indigenous to the Nox homeworld. The fenri appear hostile but keep mostly to themselves and do not harm the Nox.

The Nox have been known to conceal the fenri from attack by invaders who arrive through the Stargate and believe it is the creatures that are capable of disappearing at will.


The Nox - SG-1 travels to the Nox homeworld in hopes of capturing the fenri, until they discover it is the pacifist Nox who are capable of making the creatures invisible to attack.