Watercolour Pencil Shadings

I like using black watercolour pencils. I find it gives a nice effect and when you put the water on top it looks smooth, almost like paint. The drawings here are with only black watercolour pencil.
In this drawing the horse is standing and turning his head to look at you.

 This horse is rearing. I find that to draw a horse rearing is one of the hardest postures.

This is an Arabian horse looking at you from the tip of his eye.