Learn how to fish streamer flies in this episode. Streamers are bigger flies that you fish on an active retrieve, and these flies imitate baitfish, crayfish, leeches, and large aquatic insects like hellgrammites. Streamers are the fly-fishing equivalent of conventional lures. Because they fly is usually moving, strikes can be explosive. Streamers are a great way to cover a lot of water and are the best flies to use when you don’t know what fish are eating, or if you are fishing unfamiliar water. Streamers are perfect for the impatient angler because you move the fly a lot and don’t stay in one place very long. And streamers are typically the best flies to use when you want to catch big fish!