There is a common belief about bats that they will attack your head and grab your hair. It sounds as if this person is listening to something educational about bats on his/her ipod and learned that bats don't really fly into you hair.

In this context, it is essentially saying bats aren't as bad as people think

That means to say "you just don't know them easily. It needs to be learned." or you don't easily learn things as easy like "a hing flew in your hair." some sort of like that. I mean based on what I think it meant by the convo. :)