i was wondering...

do balrogs have wings??

yes


but they can't fly


they're like penguins

Yep they have wings, lol odd I was just watching LOTR

hmm i say this because in the books there is no mention of them flying or having wings but in the films they have wings but cant fly

I don't recall there being a very specific description. I think it was just made like that to make it seem like a demon, because that's basically what it is to normal people.