You find these just about everywhere. Mostly in the tundra in small 2-3 packs. However, you may also find packs of them in the redwood mountains or large grass plains, and of course on carnivore island.
This is basically an upgraded raptor. You can use them to collect meat, travel, and cave exploration. They're great for taming other dinos. Bring them along when you tame other dinosaurs so you can easily kill anything that tries to attack you or your taming dino.