Since there are two wings, we will divide the step into two parts. The top wings will be "a", while the bottom wings will be "b".
a. Start be drawing the top of your wings. You're going to want to make a curve going up and then another curve going down.
b. Instead of making these wings arch up, they will branch out to the sides and be longer in length. Start with a small but exaggerated curve and once you get to the top draw another (slight) curve going out.