Nice capture. I never had really though of the difference between a silhouette and back lit. The light position is similar, but to me a silhouette is opaque but a back-lit has transparency to it I think yours captures this 'back-lit' concept the best while being artistically interesting.
That is fantastic! I love the color play and contrast between willow and dull cold scene. As long as this forum is for works critique, here is another website where you can get more reviews and critique on how to buy a paper.