Batman: The Animated Series, Season 1

Dr. March:
You donate a few million, and you think you own the place. I understand I'm to analyze something for you?

Bruce Wayne:
Yeah, doc. See, I keep hearing squeaks in my chimney, and I found these in my empty fireplace. They look like hairs. I thought maybe you could tell me if I have a bat problem.

Dr. March:
And what if they are bats, Mr. Wayne? What then? Destroy them like insects? We won't survive the next evolutionary cataclysm, but bats will! They're survivors, Mr. Wayne, not pests! You should understand that!