Seems like your proportions are a bit off. The balance between the head and the rear feet are very disproportionate. The snout also seems a bit too rounded for the general pointiness of everything else. The wing's shape is not working for me. While you may be able to add depth and dimension in coloring it. The outline simply has no sense of movement or and organic feel to it. One last thing is the tip of the tail. resting on its side as it is does not add to the overall composition. Perhaps if it goes the other way and even points up a bit it will add some dynamism to the left side of the picture. KUTGW.