I know what you all are about to say, "guides?". Yeah Ive been using my Tenkara rods so much lately that I felt like I was neglecting my 4wt, and since I got a new Ross Arius for it last year for Christmas I though I should use it. With that being said, I decided to head up to a river that I don't normally fish. It was a nice cold crisp day and I watched my breath in the air as I walked that path down to the river. I could see several nice fish holding in slack currents. Needless to say, it wasn't long before I hooked up. This river had recently undergone a restoration project so with the stream bed disturbance there is very few if any caddis and or mayflies. So, diptera midges are the main food source for these particular fish. I quickly found that anything larger than an 18 was simply ignored. I spent the rest of the day throwing small midge emergers and landing quite a few nice fish. I'm not saying the you need to have a degree in entomology to fly fish but having an understanding of the bugs that trout typically eat can make the difference between a couple fish and a banner day on the river.