The mayfly formerly known as Pseudocloeon edmunsi, now known as Iswaeon anoka will be referred to as “Pseudo” in our fly bins.
Most mayflies in their dun (subimago) and spinner (imago) stages have large primary wings and small secondary wings. Pseudos are missing these secondary wings all together.
Pseudos are perfectly content emerging in vast quantities on sunny days as well as cool, cloudy ones.
These vulnerable emergers are an easy meal for feeding trout, and cdc patterns will imitate a partially emerged wing, and synthetic materials for a trailing shuck are a must have for selective fish.