What may not be as obvious is that for my take on the sketch, I cut the circle out of the front of the card and stamped the flowers on the inside.
Here's a close up of the beautiful shimmer on the card. After coloring the hummer, I used clear shimmer to blend my pencils and to add iridescence to the wings. I added a little red shimmer to his throat and a little Evergreen shimmer to the darker areas of the body for more dimension. I used a little gold shimmer on the flower centers but otherwise did not blend the watercolor pencils. (I love that you can use them dry or wet to achieve different looks.)