Drawing a raven || Animal drawing after a long time

Even though i love faces, sometimes i get tired of drawing portraits. Those time i try to draw animals or environments, but environments are extremely complicated and animals are close to people. Its pretty much the same. Draw sketch, flat color, shade, do details.

Among animals i love to draw crows/ravens. I am not sure if they are the same.
So, today, i painted one, i was actually trying out this new brush set, one of them is are named as pencil and it has such a nice texture to it and i used it for both the sketch and the details. I have to say that i really loved it.

I will have to see if i can do good with this brush in a portrait painting.

Here are some layer by layer shots of this drawing:

Reference image used for this drawing