Aliasing demon_wings -> bat_wings.

Reason: I'm at a loss to tell the difference in the images that are tagged with it.

Well there are wings like post #229977 and post #419731 under the demon_wings tag, which wouldn't fit under the bat_wings tag.

It might be better though for such images to simply be tagged demon and wings. That type of image would still be able to be found then with something like a demon wings -bat_wings search.

We went through this once before but we couldn't figure out what the hell to do with them.

Maybe do the alias after doing a once-over of the images to find and de-tag any like the ones NWF Renim mentioned.

Want to go technical and call it Patagium?

No, patagium refers to the skin that forms the surface of the wings rather than the wings themselves.

Well, if we did an alias it would have to go to bat_wings (as suggested) because bat wings are much more easily distinguishable as in post #758647, which would look very silly tagged as demon_wings.

On the other hand, non-black wings with large spikes (for lack of a better term) or really stylized like post #419731 really don't seem right as bat_wings.

Ehhh... still don't have an answer. It's something that should really be two separate tags but there's so much crossover.

Most of succubus_(ragnarok_online)'s wings would fit better as dragon wings than demon wings and I'd argue that post #229977 doesn't have wings at all. Those are part of her clothes.