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Prior to the writings of G.E.M Skues emphasizing the importance of the nymph, most of the old English wetflies and Yorkshire spiders were dressed to simulate the adult phase of waterborn naturals, a phase that, at times, can be more important than the nymph, particularly with larger insects like green drake, October caddis, or the larger stonefly species producing seasonal emergences and a lot of adults accumulating through the hatch season.

In the West, skwala stoneflies signal the beginning of the year’s parade of water-born insects and are a real opportunity for hatch-matching while there is still snow on the ground.