When I started seriously fly fishing spring was mayfly time, with the Hendrickson hatch being the first real hatch of the season. In fact, caddis flies never even registered on my fly fishing radar screen on the rivers that I fished in the Michigan. We were aware of caddis flies but they were never the main attraction. We used large Griffith Gnat type patterns to imitate the fluttering, egg laying caddis and occasionally we used a down-winged pattern, but caddis hatches were never high on our list. All that changed when I moved to Montana