Step 15 (optional): Draw something at the bald eagle's feet, like a rock, a ledge or even a flag, just so it doesn't appear to be floating. Two lines also work as a branch.
Final Step (optional): Add some shading to give your bald eagle drawing more dimension and volume. Vary the pressure on your pencil to get different degrees of tonal value. Pick the direction of the light source when shading so that the shadows are consistent with it.
You can add more value throughout your bald eagle drawing for extra detail. It's a good idea to use reference to be as accurate as possible. Don't add any value to the bald eagle's head to keep the white (bald) look.