Here is a little video of a giant stonefly we found crawling around on Stump Creek. Stump Creek doesn’t have a large giant stonefly hatch but there are few that come out in the first weeks of June. Stump Creek does have a large hatch of small golden stoneflies (size 16-18) that also hatches in the first few weeks of June. Fly fishing with adult stoneflies is a blast if you can hit the hatch just right. Here is a good description of stoneflies and their entomology: http://www.flycraftangling.com/index.asp?p=124.