Step 25: Darken the right edge of the initial guides to create the top part of the other wing. Add a thin, long arc near the middle and at the top for individual feathers. Draw a series of tiny arcs within the shape of the pegasus' wing, close to the right side, for more feathers.
Step 26: Draw a series of thin, long arcs along the left edge of the guide for the individual feathers. Make the arcs shorter the farther down you go to make the feathers smaller. The middle section of the wing should be thin, and the arcs should be small and alomost flat. Don't forget to add the part of the wing below the head but don't overlap the lines on the head.
Step 27: For a cleaner look, erase as much as you can of the initial guide lines. Don't worry about erasing all of the guides. It's okay to leave some behind. Re-draw any final sketch lines that you may have accidentally erased.
Final Step (optinal): You can stop here or you can add some shading to your pegasus drawing to give it more dimension and volume. Use a light to medium value for the shadows. Add some inside the wings to further separate each feather. Pick the direction of the light source when shading so that the shadows are consistent with it. Add the value lightly at first, then gradually build up to the level of darkness that you want. The shadows within the wing basically consist of thin, long strips of value. Vary the pressure on your pencil to get different degrees of tonal value. The pegasus is a mythical creature, so you can shade yours however you want. Add stripes or spots or even color your drawing! Shading can be time-consuming, so be patient and take breaks. And remember to pause the video to draw at your own pace.