Pencil drawing, raven with a red pearl

Hello everyone, i am here to share a new pencil drawing. I haven't drawn animals in a very long time. And i particularly love drawing ravens, or crows if you prefer to call it.
I am not sure if they are two different kind of birds. May be they are.

This one was very dark but that red gem made all the difference...

Let me know your thoughts on this drawing.

Here are some process shots:

Reference image used for this drawing.