These are NOT an early game tame!!!! Do not come into aberration thinking you'll nab one of these cuties. You have to go down a tier list. Bulbdogs to get shinehorns to get glowtails and featherlights. This is a post level 65 tame. They spawn in rad zone.
The cave where the artifact of the stalker is, is full of them. Quite easy to find high levels there instead of walking around on the red zone area. Cave entrance is at 81.4 48.2. Come with a good rock drake to make the thing easier. The best part of the cave is that, unless on got attacked they don’t move so you just have to feed them. Hazard suit is necessary