When the water is shallow, gin clear and the stream is flowing slowly you’re into trouble. You can’t choose any emerger pattern to fool the fish when thy turn selective on emerging mayflies (E.danica). The Danica Clear Water Emerger is a super pattern to fool fish when they are not easily fooled.
The Hare BWO Emerger is a go-to pattern for a lot of mayfly hatches, but works very well in several situations during a BWO hatch. It’s easy to tie and has a buggy appearance.
Gary La Fontaine is a master of observation and creativity. He designed the Sparkle Pupae series, but the La Fontaine mayfly halo emerger is often forgotten. It should not be.