I was out fishing last night here in the Upper Peninsula of Michigan. I saw a large number of big reddish-brown mayflies. I would guess a realistic imitation of these mayflies would be a size 10 or even a size 8 hook. Some seemed to have extra long bodies that curled forward over the head, in effect making a "C" shape when they landed on the water. The spinners were high above the stream mating and put on one of the more spectacular displays I've seen.
Anyone have an idea what type of mayflies these were? I'm no expert, but I'm assuming they were Brown Drakes? Does this sound right?
If so, what is the best imitation for a Brown Drake dun and/or spinner?