I see. Then your changes are more extensive than just the wings, I'd imagine. It's just a guess, but...flying creatures usually have hollow skeletal structures, in order to substantiate flight more easily. Lighter bones, less to hold up in the air.

[As he speaks, he begins to slowly move away from the street. He keeps it at Flynn's pace of course, not moving if the other is not secure in his footing.]

Your body is adapting, slowly. The question now is when did all this start happening to us, and why?