"Did you see the penguins?"
Translation:Est-ce que vous avez vu les pingouins ?
I was wondering this too and found my little Google expedition quite fascinating. I highly recommend reading this discussion on Stack Exchange French:
I have decided that I will use manchot for the southern hemisphere, non-flying penguin because it seems to be the more technically correct term.
I will never dispute someone using pingouin for the same creature because the whole issue seems fraught with contention.