I recently did a dove appliqued on a blue on blue background that looks like the sky, especially after it was quilted.
I got the picture of the dove from a website that has free coloring pages, took it to a copy shop and had it enlarged. I didn't know how much bigger it would need to be, so explained what I wanted to the young man who does the big enlargements. His grandmother is a quilter, so he knew what I wanted. He made several sizes for me, all of which I rolled up and took home and laid out on the proposed background. Because the dove was to be white, I chose a white on white fabric, cut the whole bird out of that fabrick and then fused it with lightweight Wonder Under onto the background fabric and appliqued the bird with light (very light) blue thread. I satin stitched the area between beak and head and places where the wing was defined by feathers. After my wonderful long arm quilter quilted it, the feathers looked like real feathers. I used a dark gold to hand embroider the eye.
I think you could do something similar with a soaring eagle picture you find in a color book on line. If you use Crayolas, you can color the fabric and heat set it. You could also use colored pencils if you go over the fabric with a medium that sets the colored pencils. Sorry I can'tremember the name of the medium.
I put a 1 inch white border around the blue sky and four inch borders in the order of the rainbow--red, orange, yellow, green, blue, indigo, purple. It is a big, big quilt--120 inches by 120 inches and will be a bedspread for my daughter's king size bed. The project has been a lot of fun, but also a lot of work.
I know your eagle will turn out great and hope you have as much fun with it as I have had with the dove. froggyin texas