It says these are 'non - violent' but my god! They are not! I found 6 of them inside a cave. These started attacking me on sight, I'm a beginner so I fled the cave and outside was my ptera on attack target mode and they began to fight and they took my ptera so high in the sky that it couldn't hear my whistles and finally they killed my lvl 60 ptera while I stood down helplessly and watched ptera getting killed.
I go to center caves, 2 in redwoods and floating island are best. Full ghillie, bug repellant, sacrificial sheep, chainsaw, sleeping bags, preserving salt. Use wyvern wing flap your target to safe area make sure bat is just above character level. Kill that ovis with chainsaw! Place sleeping bag just in case.. Put taming mutton in inventory with half stack of salt. Rest of salt and mutton into wyvern. Ghillie up! Bug spray! Walk slow! Stand under feed, do not move. Stand there for 5 mins(might be shorter but dang its long) it goes faster after that first bite. Keep track of repellent back away slow and reapply if needed! Perfect tame every time!
I have 8 very high level bats protecting my Dino pen and during an offline raid on me the bats swarmed the three raiders and managed to kill all three of them. The had journeyman Flak and mastercraft weaponry. So in the near future I will be taming many more of them