Is is wings a common noun?

Yes, the noun 'feather' is a common noun, a general Word for one of the flat appendages growing from a bird's skin that forming its plumage; a general Word for a fringe of hair on the legs or tail of some dogs and other animals; a Word for any feather of any kind.

A proper noun is the name or title of a specific person, place, or thing; for example, The Feather Islands (Fjaderholmarna) in Sweden or "Feather", a novel by Laurie Lyons.

The Word 'feather' is also a verb: feather, feathers, feathering, feathered.