Was out at a local lake today and as I was releasing a fish, this guy sort of paddled up to my float tube. I got off a poor picture before he went under the tube and disappeared. Approx 3 to 4 inches long and at first I thought a walking stick, but it was swimming under the surface film. Odd critter for sure and I did not have a replica in my fly box. I will research it tonight but I thought I would drop a post/image here. I did a search of the Entomology forum but came up with nothing close. BTW the surface temp was 68 to 70 degrees and fishing was slow.