Just last week i went to lake francis in pa when i saw at least 100 trout jumping out of the water where the cool water ran into the warm lake. i tried several flies and then i tried a black peacock midge whitch is constructed of black hackle for tail body was peacock and hackle was black and this fly allowed me to land 11 brown trout whitch were all 13-15 inches in 2 hours.try it it works and good luck