The ThornTail Tribe are a herbivorous, peaceful tribe of dinosaurs who live in ThornTail Hollow in Star Fox Adventures. They are based on a group of armor-plated dinosaurs known as Nodosaurs. The ThornTail are afraid of the dark, requiring lit beacons to feel safe at night. Their tribe is very peaceful, as they do not get involved with the war against the SharpClaw. The ThornTails seem to have a close relationship with the EarthWalkers, calling Queen EarthWalker their queen as well. The Thorntails have thick, brownish golden skin, spiked armor, and large beaks. They are herbivores and graze on the weeds and grass below. Their hind legs are larger than their front legs, rendering them slightly clumsy.
In Star Fox: Assault, the bodies of ThornTails infected by the Aparoids littered the ground of Sauria during the Aparoid Invasion. It appears that the ThornTails were incapable of defending themselves against the invading forces.
- Crazy ThornTail - This ThornTail has lived alone at the bottom of the Ancient Well for fifty years, guarding the dark caves below. He refuses to let Fox enter unless he has purchased the FireFly Lantern from the ThornTail Store. He sleeps most of the time and his way of speaking is strange, to say the least.
- Mother ThornTail - A mother ThornTail who is very concerned about the safety of her unhatched young. She has good reason to be as the EggSnatchers attempt to feed on the eggs before Fox drives them away. She dwells near the Warp Stone in a small cave.
- Quiet ThornTail - A ThornTail who mumbles and grumbles to himself. "I haven't spoken since something terrible happened." he remarks. This brave dinosaur led a small revolt against General Scales and his three friends were captured. He is also the GateKeeper of Dragon Rock, which he manages to keep secret from Fox, even though he is among game's first dinosaurs Fox is able to speak with.
- Angry ThornTail - Guards treasures and chases Fox away if he tries to collect it.