The story thus far: I had failed at making a maple leaf, but thought the shape suggested an eagle. My first attempt to turn it into an eagle led instead to a baby bird. Now it's time to try to turn that chick into an adult eagle.
Again I let the shapes speak to me, to suggest what they wanted to be. I know it sounds funny, but it's hard to describe. Think of it as doing "free association" but with shapes instead of words.
I decided that the key to the eagle was to turn the wings upside down. I was very pleased with the next draft, despite a mis-start with the tail. From there, it was just tweaking for the final shape. Designers's trick: note how some of the birds have two different wing treatments. If it's not going to be a final draft, a piece doesn't have to be neat or symmetrical. By trying different things in the same piece, you can cut down the number of drafts. I once made a snowflake with 5 different points. Better to have one really ugly one than to make five separate ones before getting it right in my opinion.