Hello. Went creek fishing today expecting to be fishing like size 16-18 bugs then i find a bunch of these darker big guys? The darker one is like a ssize 10-12! Then there were a bunch of these lighter colored guys. There were larger sizes of the white ones, they seemed to have extremely long tails. Similar in size to the olive one. Never was able to grab one of the larger white ones. Heck my best fly of the day was a freaking size 10 4xl hook turk turantula. The fish in this creek rarely break 13" lol! This is from northwest wa btw. North cascades. Thanks for any help on this. New to fishing creeks.