I worked on a screech owl this past week. It is a small piece, 5X7. I had made up some coffee stained paper and thought his colors would work nicely. I do a general pencil sketch to work out the dimensions, then start at the top and work my way down. I lay in dark's, under colors, with birds I then add a layer of white, go back into it with detail work using browns, blues and blacks. Final touches of white and blacks. I use stick pastels, medium hard for under painting and soft for finishing accents. Pastel pencils and charcoal pencils, both black & white, create the fine lines.
I tried to add a step by step video but after 3 tries I must be doing something wrong and will have to revisit this another day. Until then here is the finished piece.