Often making one picture leads to another. As I finish photographing some grasses in a creek along the Pere Marquette River, a fly that looks to me like a mayfly lands in the water just a few feet away. What catches my eye is the large concentric rings the fly and another that landed moments earlier are making on the water. How can such a small creature make such a big impression? F4 at 1/250, ISO 100, 80-200mm lens at 200mm