User blog comment:HiddenVale/Did Balrogs have wings?/@comment-166.137.136.52-20150602163844

Remember that the Balrogs represent demons in terms of the Middle-Earth symbolism, and they are described as masters of the shadows. So their appearance is up to them, and the dark wings were probably pretty intimidating. But they are always shown FALLING to their deaths, and so the language used could just be figurative in regards to the "wings".