Getting the bats out of a cave is the best I recommend the one in the island by blue ob not that main cave with untameable dinos a much smaller on in the ice you can get them to the mouth then they get stuck and can't fly out if you jump they fly down and at out the mouth at you then kite them into a 3 by 1 trap 2 high you can see it on YouTube and from there have all you mutton / bug repellent near by , when trapped the bat seems to not care about you even without the repellent but it's just easyer to have just incase
If you're planning on taming these guys BE PREPARED AND IF YOU'RE PLAYING ONLINE GO WITH ATLEAST 4 PEOPLE IF YOU WANNA TAME THIS!!! It gives mega rabies and will kill you! Also if somebody gets the mega rabies STAY AWAY FROM THEM. ITS CONTAGIOUS.
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!