Now we can start the main drawing.
If you need it, draw some guide lines, like you see in the image. Try to keep the right proportions of the different parts of the Eagle. The head is medium sized if compared to the body, which is round and elongated. When the guide lines are done and you think they are correct, start the actual drawing. This is an important step, draw the most evident parts and details, like eye, beak, some feathers, the feet and so on.
For this step I've used HB pencil.