I've been fishing a stream on the west side of the cascades, for the last few weeks. I've never really fished during winter; I usually hit the snow instead. I've tried just about every pattern in my fly box, including midges, eggs and streamers. However, I have only been able to catch fish on a #10 hares ear nymph. It works both dead drifted and swung. Does anyone have any theories about what the fish might think this fly represents? I thought winter was all about eggs and midges, but neither of those have worked for me.