Step 20: Use the long, curved line on the right as a guide to draw the kangaroo's tail. Follow the path of the guide and draw the shape of the tail around it. The base of the tail should be thick, and the shape should gradually get thinner toward the tip. Red kangaroos use their tails to support their entire weight, so make the shape long and thick.
Step 21: 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 drawing to give it more dimension and volume. Pick the direction of the light source when shading so that the shadows are consistent with it. Vary the pressure on your pencil to get different degrees of tonal value. For a more detailed guide on how to shade, check out this tutorial: How to shade.
Add a cast shadow underneath to show that the kangaroo is jumping. The lower the shadow, the higher off the ground the kangaroo will be.
You can add even more value to your drawing for extra detail. Kangaroos don't really have a pattern on their coats, so just use a medium value throughout the body. As you add the value to the body, use strokes that go in the general direction of the fur. Darken up the shadows as you shade the kangaroo's body. The toes and fingers should be darker too. Don't worry about shading too smoothly. The coat should have a coarse texture. Shading can be time-consuming, so be patient and take breaks. It's always a good idea to use reference as you draw. Remember to pause the video to draw at your own pace.