Step 20: 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 you may have accidentally erased.
Final Step: Add some shading to your flying fox drawing for extra detail. Use a very light value on the wings. Vary the pressure on your pencil to get different degrees of tonal value. Use smooth strokes for a non-textured surface on the wings. Use a dark value for the arm and digits. Start with a light value and slowly work your way up to a dark value on the arm and digits. Use a light value for the skin on the bat's wing to emphasize the contrast with the dark arm and digits. Remember to use smooth, even strokes on the wings to avoid a textured surface. For a more detailed guide on how to shade, check out this tutorial: How to shade.
Shade the flying fox's ears and nose using a dark value and use a medium value for the rest of the head. Use a series of short strokes to shade the body for a fur-like texture. Use strokes with a horizontal orientation as you shade the fur on the bat's body. Use a dark value on the body for some shadows and a bit of a coat pattern. Use some dark value on the flying fox's head too. Shading can be very time-consuming, so be patient and take breaks.
It's a good idea to use reference as you draw for an accurate depiction of a flying fox. Draw a series of random lines on the wing on the right for veins and creases on the almost translucent skin. Don't forget to pause the video after each step to draw at your own pace.