Wanderers were green (means 9th level or below) Stationary ones in cave connected to Loda'Kai Poacher/Trader cave camp were *red*
To my 19th level ranger:
Wanderers were green Stationary ones in cave connected to Loda'Kai Poacher/Trader cave camp were *white* (meaning 19th level)
The high level ones may be the ones with the stones as I have yet to find one on a low level one.
Notes:
1. The wanderers (9th level or lower) have about 100 to 150 HP. I've waited a long time to get my Vah Shir Beastlord up to 34th level to get his 150 point nuke and he now nukes the wanderers with ease.
2. The cave version (19th level) have about 300 HP. The same nuke used on these toons gets them to about half health.
3. The key to insuring that the stone is on these toons is to kill them with a single nuke, or two if you're *really* fast. You are trying to prevent the reappearance of that pet, which means the stone would be gone.