The baetis nymphs found in Colorado river systems can range in size from 16 to 22, so carry a variety of sizes to match. You'll notice that as it gets later in spring and the annual runoff ...

The BMW Foam Top RS2 Flies don’t have to be super-exact, and we dub this fly the BMW because it imitates “baetis, midges, whatever.” Simply tied in gray or black versions with a square-cut white foam ...