One of the first things that a fly fisher learns is that matching the hatch is important. But how, exactly, do you do that–especially when there are no insects on the water’s surface? Here’s a two-part video lesson that demonstrates four methods for sampling the water, which will show you what’s available to trout right now and what food items are generally available. After you’ve determined the most likely bug, the video offers a simple and effective way to choose a fly that will accurately imitate the insects in your sample.