If the bird doesn't have a band, it's most likely a feral. Could it be a baby? Only a picture could tell us (maybe)........missing feathers indicates that most likely something tried to grab it. Cat? Hawk? Depending on how many feathers are missing, it might be difficult for the bird to fly. If you contacted a club and told them there is no band, you probably won't hear back from them, but I COULD be wrong...........
If you can post a picture of the bird, we can go from there.