i know some about stoneflies and there being the salmonfly,goldenstone,yellowstone,lime and yellow sally, skwala, little black and little brown stone. but every once and a while on a river i have fished every summer of my life. theres this bug that hatches. its a stonefly forsure. but its 3 inches long ATLEAST. it makes the salmonflies look like midgets.. i can only imitate it by using a size 2 streamer hook and tying a stonefly patter on it.so i was just wondering if this is just another subspecies of the salmonfly. they look pretty much the same. dark brown with some orange/pinky color on there belly but these things are HUGE. i just got thinking about it after all this talk about sedges and caddis only hatching ever few years type life cycle. and if theres some humungoid stone that does the same. or am i just nuts???