Trout and other fish often key on terrestrials by mid-summer, which is why we're smitten with Umpqua's Chubby Chernobyl 12-Pack. This foamy dry fly mimics grasshoppers, beetles, and stonefly hatches on the surface with enough heft to haul a beefier dry dropper underneath for sub-surface feeders. No fly box is complete without some Chubby Chernobyls, and this 12-pack makes sure we don't run out when the bite is on.