Owl Drawing (9th Grade): WIP Process

So, over the course of the two months it took me to draw my owl, I uploaded four WIPs. So here is the deviation that puts them all together so that you can see how the drawing progressed over time.

HERE IS THE FINISHED RESULT:
[link]
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WHAT YOU SEE HERE IS DARKER THAN WHAT IT LOOKS LIKE IN REAL LIFE. IF YOU'D LIKE TO SEE WHAT IT LOOKS LIKE, PLEASE VIEW THE FINISHED PIECE: [link]