Step 15: Use the line on the left side as a guide to draw the hind leg. Follow the path of the guide as you create the shape of the frilled-neck lizard's leg and make it thicker. The toes on the hind feet are a little longer, so use longer lines when creating them. Use a few lines to indicate the toes of the hind leg on the other side peeking through.
Step 16: Use the initial arc shape as a guide to draw the frilled-neck lizard's body. Simply darken the top and bottom parts of the arc to create the shape of the body.
Step 17: Use the curved line on the left side as a guide to draw the frilled-neck lizard's long tail. Follow the basic path of the line as you draw the tail but make the shape thicker at the base. You can also draw the tail straight behind the body to make it easier. The tail should get progressively thinner and end at a point.
Step 18 (optional): 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: Add some shading to your frilled-neck lizard 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. Leave a few lines blank along the frill to indicate the cartilage spines that make the frill open up.Add the value lightly at first, then gradually build up to the level of darkness that you want. Vary the pressure on your pencil to get different degrees of tonal value. Use a darker value near the middle of the shadow and a lighter value along the edge for the shadow's diffusion.
Add a cast shadow underneath. This helps ground the lizard so it doesn't appear to be floating.
You can add more value throughout your frilled-neck lizard drawing for more detail. Frilled-neck lizards have very rough and bumpy skin, so use random scribbles instead of smooth shading. Don't overthink it when adding the rough texture on the skin. It seems more difficult than it is. Just add random scribbles everywhere. Remember to leave a few lines along the frill relatively blank to represent the spines that open it up. Add a few tiny triangle shapes along the edge of the frill for the spikes found there. Adding the skin texture can be quite time-consuming, so be patient and take breaks. It's always a good idea to use reference for a more accurate drawing. Don't forget to pause the video after each step to draw at your own pace.