Fly swaps are just that, swaps of fly patterns with others. Within the Fly
Swaps Forum someone suggests a swap, usually with a theme in mind. Those that start the discussion are usually the Swap Meister, in that they are sent flies by the participants and then divi up and send back out to the participants examples of each pattern.
If you're adding photos for your swap, please navigate to the applicable category to the left first, and then hit upload photos. If there isn't a category for your swap yet, send a message to Chris.