More wing sketches! In the first one (above) I’ve tried to transfer the pose of the topmost swan in this photo to a pegasus. Of course, I could only guess the exact bone positions, but I think they make sense. 🙂
The second sketch (below) shows the same pegasus folding her wing. The bones are marked in red, the primary feathers (those attached to the last bone near the tip of the wing) in green. This is an attempt to figure out how the joints and feathers move.