Well of course bats are mammals not birds. I can also assure you that there is no scientific data nor is there any reason to believe that bats can detect weather radar. Bats use echo location with sound, just at a frequency that we cannot detect. Therefore turning on the radar has no effect. Unfortunately, the urban legend of turning on radar to "scare away" birds has permeated our industry and therefore there are still many companies and airports that put references to it in their SOP's.
As an aside bat strikes are not that uncommon. as for mammal strikes in general there are lots of them. In North America the most comonly struck mammals are deer. Around the world there are all kinds of unusual things struck by aircraft including fish, cows, turtles and the list goes on.