I had thought that drawing an animal from beginning to the end -the whole process- will be the last post of the whole ‘animal’ unit, and I was between an elephant and rhino to draw for that. Well, I have done the elephant, but rhino remained in my mind and I wanted to add a short post with rhino anyway.
I have started with studying the animal at first like I have done in the previous posts. 
So, I have done some sketching for skull and skeleton to get the general feature in my mind. 
After that I skipped to memory study, to check what I have in my memory of a rhino and then build a visual library in a way like –in the previous two posts you can find more detailed version of this study-, draw what you have in your memory and compare it to the animal (from life or from a photo/frozen moment of a video). Repeat the steps as long as you want to go and spare short time for each try, like a minute or two. The point of this study is building a visual library for the subject animal. 
Then I skipped drawing from a reference photo, made that step with an HB pencil. 
This is how it was when I decided to let it go already. I used HB, 2B, 4B, 8B sketching pencils for the rhino; and soft pencils, blending stump and kneaded eraser for the background.
