Step 15: Use the angled line to the right as a guide to draw the first hind leg. The top part of the hind leg, right before the joint, is bigger and rounder than the weasel's front leg. Below the joint, the shape of the leg should slope to the left and end at the wide foot and toes at the bottom.
Step 16: Use the last angled line under the body as a guide to draw the other hind foot the same way. A big part of this leg will be hidden behind the weasel's body and the other leg, so only draw the parts that are visible from this angle.
Step 17: Use the remaining lines as guides to draw the rest of the body. Simply darken the outer edges of the initial guides to create the shape of the body. On the right side, draw the shape of the weasel's tail around the initial sloping line. Use a series of short strokes to represent the bushy fur on the tail.
Step 18: 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 weasel drawing for extra detail. Use short strokes to draw the line on the body that separates color. Use a dark value for the nose and a medium value for the body, except for the underside. Weasels have a flat, sleek coat, so use smooth strokes as you shade and avoid a rough texture. As you shade, use strokes that go in the general direction of the fur. The strokes along the weasel's body have a general horizontal orientation, while on the feet they're more vertical. Add the value very lightly at first to get comfortable shading. Then gradually make the value darker. Use a darker value to shade the fur on near the tip of the tail. For a more detailed guide on how to shade, check out this tutorial: How to shade.
Add some shading to your weasel 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. Shading can be time-consuming, so be patient and take breaks. You can add more value to the body as you add the shadows too. It's always a good idea to use reference as you draw for a more accurate-looking weasel.
Add a cast shadow underneath. This helps to ground the weasel so it doesn't appear to be floating. Don't forget to pause the video after each step to draw at your own pace.