>>724761315
The simple fact is with just a skeleton we have no idea what they looked like. Sure their skeletons are bird-like, so they probably did share some features and we know smaller ones did have proto-feather spines (and that Trex didn't) and flight feathers on the upper arms for unknown evolutionary reasons (Probably sexual display or balance as they ran or both), but other than that your guess is as good as mine as to what they looked like.