Here is a quick study of a Red Tail Hawk. What makes it interesting? Is it the shape of the bird or the shapes including the telephone pole? It is almost the right answer! The pole shows two sides and vaguely so does the hawk. Don't forget to add "sides" to clouds, beaches, rocks, mountains as well as birds and objects. Then they become "forms" and  three-D.
The hawk has a puffy chest because the gold brings if forward. The cool lavender paper recedes behind the image. Note how you don't mind the blotch/mistake. It is because you are not responsible for it! Be kind to your paintings and let them have flaws-they are like our friends and ourselves!